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ORCIDMaurits Ortmanns
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- affiliation: University of Ulm, Germany
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2020 – today
- 2024
[j59]Markus Sporer
, Ioana Georgiana Vasilas, Ahmed Adzemovic, Nicolas Graber, Stefan Reich, Calogero Gueli, Max Eickenscheidt, Ilka Diester, Thomas Stieglitz, Maurits Ortmanns:
NeuroBus - Architecture for an Ultra-Flexible Neural Interface. IEEE Trans. Biomed. Circuits Syst. 18(2): 247-262 (2024)- [j58]David-Peter Wiens, Markus Sporer, Björn Driemeyer, Maurits Ortmanns:
A Mixed-Signal Integrator-Differentiator-TIA. IEEE Trans. Circuits Syst. II Express Briefs 71(3): 1057-1061 (2024) - [j57]Paul Kaesser, Johannes Wagner, Omar Ismail, Maurits Ortmanns:
Inner Transfer Functions in Incremental ΔΣ ADCs. IEEE Trans. Circuits Syst. II Express Briefs 71(9): 4111-4115 (2024) - [j56]Rohan Asthana, Joschua Conrad, Youssef Dawoud, Maurits Ortmanns, Vasileios Belagiannis:
Multi-conditioned Graph Diffusion for Neural Architecture Search. Trans. Mach. Learn. Res. 2024 (2024) - [c232]Simon Wilhelmstätter, Joschua Conrad, Devanshi Upadhyaya, Ilia Polian, Maurits Ortmanns:
Attacking a Joint Protection Scheme for Deep Neural Network Hardware Accelerators and Models. AICAS 2024: 144-148 - [c231]Joschua Conrad, Simon Wilhelmstätter, Rohan Asthana, Vasileios Belagiannis, Maurits Ortmanns:
Too-Hot-to-Handle: Insights into Temperature and Noise Hyperparameters for Differentiable Neural-Architecture-Searches. AICAS 2024: 557-561 - [c230]Xinyu Qin, Yichen Jin, Guoxing Wang, Sai-Weng Sin, Maurits Ortmanns, Yong Lian, Liang Qi:
A 15MHz-BW 82.7dB-SNDR 98.8dB-SFDR Pipelined MASH 2-2 CT DSM in 65nm CMOS. CICC 2024: 1-2 - [c229]Simon Wilhelmstätter, Joschua Conrad, Devanshi Upadhyaya, Ilia Polian, Maurits Ortmanns:
Enabling Power Side-Channel Attack Simulation on Mixed-Signal Neural Network Accelerators. COINS 2024: 1-5 - [c228]Ahmed Abdelaal, Michael Pietzko, Jonathan Ungethüm, John G. Kauffman, Maurits Ortmanns:
Using Negative-R Assisted Integrators in Wide-band Delta-Sigma Modulators. ISCAS 2024: 1-5 - [c227]Bjoern Driemeyer, Holger Mandry, David-Peter Wiens, Joachim Becker, Maurits Ortmanns:
Optimisation of RO-PUF Design Parameters for Minimising the Effective Area per PUF Bit. ISCAS 2024: 1-5 - [c226]Omar Ismail, Paul Kaesser, John G. Kauffman, Maurits Ortmanns:
DAC Element Mismatch Shaping Algorithms in Incremental Delta-Sigma ADCs. ISCAS 2024: 1-5 - [c225]Paul Kaesser, Omar Ismail, David-Peter Wiens, Maurits Ortmanns:
Offset Cancellation in Incremental ∆Σ ADCs. ISCAS 2024: 1-5 - [c224]Paul Kaesser, Sebastian Kaltenstadler, Joschua Conrad, Johannes Wagner, Omar Ismail, Maurits Ortmanns:
Stability Prediction of Δ∑ Modulators using Artificial Neural Networks. ISCAS 2024: 1-5 - [c223]Niklas Klefe, Rudolf Ritter, Mahdi Rajabzadeh, Thomas Mayer, Maurits Ortmanns:
Overcoming Impedance-Mismatch Induced Offsets in Background Bond Wire Defect Detection. ISCAS 2024: 1-5 - [c222]Michael Pietzko, Jonathan Ungethüm, Ahmed Abdelaal, John G. Kauffman, Maurits Ortmanns:
A 600MS/s 10-bit SAR ADC with unit via-based delta-length C-DAC in 22nm FDSOI. ISCAS 2024: 1-5 - [c221]David-Peter Wiens, Björn Driemeyer, Maurits Ortmanns:
A Mixed-Signal TIA with Input Restoring ADC. ISCAS 2024: 1-5 - [c220]Joschua Conrad, John G. Kauffman, Simon Wilhelmstätter, Rohan Asthana, Vasileios Belagiannis, Maurits Ortmanns:
Confidence Estimation and Boosting for Dynamic-Comparator Transient-Noise Analysis. NewCAS 2024: 1-5 - [c219]Omar Ismail, Paul Kaesser, John G. Kauffman, Maurits Ortmanns:
Non-Ideal Reset in Incremental Delta-Sigma ADCs. NewCAS 2024: 118-122 - [c218]Matteo Dalla Longa, Francesco Conzatti, Omar Ismail, John G. Kauffman, Maurits Ortmanns:
A 470μW, 102.6dB-DR, 20kHz BW Calibration-Free ΔΣ Modulator with SFDR in Excess of 110dBc using an Intrinsically Linear 13-Level DAC. VLSI Technology and Circuits 2024: 1-2 - [i1]Rohan Asthana, Joschua Conrad, Youssef Dawoud, Maurits Ortmanns, Vasileios Belagiannis:
Multi-conditioned Graph Diffusion for Neural Architecture Search. CoRR abs/2403.06020 (2024) - 2023
- [j55]Michael Pietzko, Jonathan Ungethüm, John G. Kauffman, Maurits Ortmanns:
Delay Error Shaping in ΔΣ Modulators Using Time-Interleaved High Resolution Quantizers. IEEE Trans. Circuits Syst. I Regul. Pap. 70(7): 2700-2710 (2023) - [j54]Stefan Reich, Dominik Fritschi, Markus Sporer, Maurits Ortmanns:
In Vitro Study of Artifact-Recovery Using a 32-Channel Neuromodulator Platform. IEEE Trans. Circuits Syst. I Regul. Pap. 70(9): 3474-3483 (2023) - [j53]Paul Kaesser, Omar Ismail, Johannes Wagner, Robert F. H. Fischer, Maurits Ortmanns:
Frequency-Domain Analysis of Reconfigured Incremental ΔΣ ADCs on the Example of the Exponential Phase. IEEE Trans. Circuits Syst. I Regul. Pap. 70(11): 4346-4356 (2023) - [j52]Jingying Zhang, Sai-Weng Sin, Yan Liu, Fan Ye, Guoxing Wang, Maurits Ortmanns, Liang Qi:
On the Synthesis of Continuous-Time Sturdy MASH Delta-Sigma Modulators. IEEE Trans. Circuits Syst. II Express Briefs 70(2): 356-360 (2023) - [j51]Matteo Dalla Longa, Francesco Conzatti, Tobias Hofmann, John G. Kauffman, Maurits Ortmanns:
An Intrinsically Linear 13-Level Capacitive DAC for Delta Sigma Modulators. IEEE Trans. Circuits Syst. II Express Briefs 70(4): 1291-1295 (2023) - [c217]Bernhard Lippmann, Joel Hatsch, Stefan Seidl, Detlef Houdeau, Niranjana Papagudi Subrahmanyam, Daniel Schneider, Malek Safieh, Anne Passarelli, Aliza Maftun, Michaela Brunner, Tim Music, Michael Pehl, Tauseef Siddiqui, Ralf Brederlow, Ulf Schlichtmann, Bjoern Driemeyer, Maurits Ortmanns, Robert Hesselbarth, Matthias Hiller:
VE-FIDES: Designing Trustworthy Supply Chains Using Innovative Fingerprinting Implementations. DATE 2023: 1-6 - [c216]Jonathan Ungethüm, Michael Pietzko, Ahmed Abdelaal, John G. Kauffman, Maurits Ortmanns:
A Chopped 6-bit 1.6 GS/s SAR ADC Utilizing Slow Decision Information in 22 nm FDSOI. ESSCIRC 2023: 141-144 - [c215]Mohamed A. Mokhtar, Omar Ismail, Patrick Vogelmann, John G. Kauffman, Maurits Ortmanns:
A 40 kS/sCalibration-Free Incremental △Σ ADC Achieving 104 dB DR and 105.7 dB SFDR. ESSCIRC 2023: 401-404 - [c214]Bjoern Driemeyer, Paul Kaesser, Holger Mandry, David-Peter Wiens, Maurits Ortmanns:
A Feasibility Study on a Switched-Capacitor Based PUF in 28 nm Technology. ICECS 2023: 1-4 - [c213]Bjoern Driemeyer, Paul Kaesser, Maurits Ortmanns:
Optimum Position of Digital DAC Error Correction relative to the Decimation Filter in ΔΣ ADCs. ICECS 2023: 1-4 - [c212]Paul Kaesser, Johannes Wagner, Omar Ismail, Bjoern Driemeyer, Maurits Ortmanns:
Quantizer Gain in Incremental Delta-Sigma ADCs. ICECS 2023: 1-4 - [c211]Paul Kaesser, Omar Ismail, Christian Rudorf, Johannes Wagner, Maurits Ortmanns:
Linear-Exponential I-DS ADCs: Analysis, Limitations and Higher Order. ISCAS 2023: 1-5 - [c210]Matteo Dalla Longa, Francesco Conzatti, Jose Luis Ceballos, Maurits Ortmanns:
On the Intrinsic Linearity Limitations of Single-Bit Delta Sigma Modulators. ISCAS 2023: 1-5 - [c209]Markus Sporer, Nicolas Graber, Stefan Reich, Calogero Gueli, Joachim Becker, Thomas Stieglitz, Maurits Ortmanns:
NeuroBus - Architecture and Communication Bus for an Ultra-Flexible Neural Interface. ISCAS 2023: 1-5 - [c208]Michael Pietzko, Julian Spiess, Jonathan Ungethüm, John G. Kauffman, Qiang Li, Maurits Ortmanns:
Bitwise ELD Compensation under Integrator Nonidealities in ΔΣ Modulators. NEWCAS 2023: 1-5 - [c207]Stefan Reich, Markus Sporer, Maurits Ortmanns:
A Time-Domain Charge-Balancing Method for Neuromodulators. NEWCAS 2023: 1-5 - [c206]Stefan Reich, Markus Sporer, Maurits Ortmanns:
A flexible Power Management System-On-Chip for Implantable Brain-Machine-Interfaces. NEWCAS 2023: 1-5 - 2022
- [j50]Mohamed A. Mokhtar, Ahmed Abdelaal, Markus Sporer, Joachim Becker, John G. Kauffman, Maurits Ortmanns:
A 0.9-V DAC-Calibration-Free Continuous-Time Incremental Delta-Sigma Modulator Achieving 97-dB SFDR at 2 MS/s in 28-nm CMOS. IEEE J. Solid State Circuits 57(11): 3407-3417 (2022) - [j49]Markus Sporer, Stefan Reich, John G. Kauffman, Maurits Ortmanns:
A Direct Digitizing Chopped Neural Recorder Using a Body-Induced Offset Based DC Servo Loop. IEEE Trans. Biomed. Circuits Syst. 16(3): 409-418 (2022) - [j48]Matthias Häberle, Denis Djekic, Daniel Krüger, Mahdi Rajabzadeh, Maurits Ortmanns, Jens Anders:
An Integrator-Differentiator Transimpedance Amplifier Using Tunable Linearized High-Value Multi-Element Pseudo-Resistors. IEEE Trans. Circuits Syst. I Regul. Pap. 69(8): 3150-3163 (2022) - [j47]Liang Qi, Yuekai Liu, Sai-Weng Sin, Xinpeng Xing, Guoxing Wang, Maurits Ortmanns, Rui Paulo Martins:
Wideband Continuous-Time MASH Delta-Sigma Modulators: A Tutorial Review. IEEE Trans. Circuits Syst. II Express Briefs 69(6): 2623-2628 (2022) - [c205]Markus Sporer, Stefan Reich, Holger Mandry, Joachim Becker, Maurits Ortmanns:
A Wireless Headstage Prototype Based on a Neurorecorder IC. BioCAS 2022: 65-69 - [c204]Stefan Reich, Peter Ammann, Markus Sporer, Maurits Ortmanns:
An Onchip Electrode Impedance Estimation achieving 1.2 dB 3σ-Accuracy with Minimum Hardware Overhead. BioCAS 2022: 424-428 - [c203]Stefan Reich, Markus Sporer, Joachim Becker, Stefan B. Rieger, Martin Schüttler, Maurits Ortmanns:
A 32-ch Neuromodulator with redundant Voltage Monitors avoiding Blocking Capacitors. ESSCIRC 2022: 201-204 - [c202]Bjoern Driemeyer, Holger Mandry, David-Peter Wiens, Joachim Becker, Maurits Ortmanns:
PUF-Entropy Extraction of DAC Intersymbol-Interference using Continuous-Time Delta-Sigma ADCs. ICECS 2022 2022: 1-4 - [c201]Jing Zhang, Lulu Zhang, Xiong Zhou, Maurits Ortmanns, Qiang Li:
A 13-bit 1-MS/s SAR ADC With Rotation-Based Mismatch Error Cancellation. ISCAS 2022: 6-10 - [c200]Bjoern Driemeyer, Julian Spiess, John G. Kauffman, Maurits Ortmanns:
Complexity Reduced LUT-Based DAC Correction in Continuous-Time Delta-Sigma Modulators. ISCAS 2022: 16-20 - [c199]Jonathan Ungethüm, Michael Pietzko, John G. Kauffman, Qiang Li, Maurits Ortmanns:
Maximizing the Inter-Stage Gain in CT 0-X MASH Delta-Sigma-Modulators. ISCAS 2022: 561-565 - [c198]Michael Pietzko, Jonathan Ungethüm, John G. Kauffman, Qiang Li, Maurits Ortmanns:
Bitwise ELD Compensation in Δ∑ Modulators. ISCAS 2022: 566-570 - [c197]Johannes Wagner, Mohamed A. Mokhtar, Maurits Ortmanns:
Automated Design of Sigma-Delta Modulators with FIR Feedback. ISCAS 2022: 571-575 - [c196]Stefan Reich, Dominik Fritschi, Markus Sporer, Maurits Ortmanns:
An Experimental Reliability Study of Pseudo-Resistors in Biomedical Applications. ISCAS 2022: 1892-1895 - [c195]Stefan Reich, Dominik Fritschi, Markus Sporer, Maurits Ortmanns:
Artifact-Recovery in Neuromodulators using Tunable High-Pass Corners. NEWCAS 2022: 55-59 - [c194]Stefan Reich, Gunnar Kunze, Markus Sporer, Maurits Ortmanns:
Analysis of Chopper Ripple Reduction by Delayed Sampling. PRIME 2022: 213-216 - 2021
- [j46]Stefan Reich, Markus Sporer, Michael Haas, Joachim Becker, Martin Schüttler, Maurits Ortmanns:
A High-Voltage Compliance, 32-Channel Digitally Interfaced Neuromodulation System on Chip. IEEE J. Solid State Circuits 56(8): 2476-2487 (2021) - [j45]Stefan Reich, Markus Sporer, Michael Haas, Joachim Becker, Martin Schüttler, Maurits Ortmanns:
Erratum to "A High-Voltage Compliance, 32-Channel Digitally Interfaced Neuromodulation System-on-Chip". IEEE J. Solid State Circuits 56(10): 3203 (2021) - [j44]Stefan Reich, Markus Sporer, Maurits Ortmanns:
A Chopped Neural Front-End Featuring Input Impedance Boosting With Suppressed Offset-Induced Charge Transfer. IEEE Trans. Biomed. Circuits Syst. 15(3): 402-411 (2021) - [j43]Alice Lanniel, Tobias Boeser, Thomas Alpert, Maurits Ortmanns:
Noise Analysis of Charge-Balanced Readout Circuits for MEMS Accelerometers. IEEE Trans. Circuits Syst. I Regul. Pap. 68(1): 175-184 (2021) - [j42]Yanquan Luo, Maurits Ortmanns:
Input Referred Noise of VCO-Based Comparators. IEEE Trans. Circuits Syst. II Express Briefs 68(1): 82-86 (2021) - [j41]Mahdi Rajabzadeh, Matthias Häberle, Joachim Becker, Maurits Ortmanns:
Comparison Study of DAC Realizations in Current Input CTΣΔ Modulators. IEEE Trans. Circuits Syst. II Express Briefs 68(1): 111-115 (2021) - [j40]Sven Müelich, Holger Mandry, Maurits Ortmanns, Robert F. H. Fischer:
A Multilevel Coding Scheme for Multi-Valued Physical Unclonable Functions. IEEE Trans. Inf. Forensics Secur. 16: 3814-3827 (2021) - [c193]Mohamed A. Mokhtar, Ahmed Abdelaal, Markus Sporer, Joachim Becker, John G. Kauffman, Maurits Ortmanns:
A 0.9-V Calibration-Free 97dB-SFDR 2-MS/s Continuous Time Incremental Delta-Sigma ADC Utilizing Variable Bit Width Quantizer in 28nm CMOS. CICC 2021: 1-2 - [c192]Maurits Ortmanns:
Wideband and Low-Power Delta-Sigma ADCs: State of the Art, Trends and Implementation Examples. ESSCIRC 2021: 28-35 - [c191]Joschua Conrad, Biyi Jiang, Paul Kässer, Vasileios Belagiannis, Maurits Ortmanns:
Nonlinearity Modeling for Mixed-Signal Inference Accelerators in Training Frameworks. ICECS 2021: 1-4 - [c190]Mohamed A. Mokhtar, Martin Merkle, John G. Kauffman, Maurits Ortmanns:
A Comparative Study of Noise Behavior in Single-Opamp Resonators in Delta-Sigma Modulators. ICECS 2021: 1-4 - [c189]Jonathan Ungethüm, John G. Kauffman, Maurits Ortmanns:
Digital Resolution Requirements in 0-X MASH Delta-Sigma-Modulators. ICECS 2021: 1-4 - [c188]Ahmed Abdelaal, Michael Pietzko, Mohamed A. Mokhtar, John G. Kauffman, Maurits Ortmanns:
FIR Filter with Symmetric Non-Equal Coefficients for CT Delta-Sigma Modulators. ISCAS 2021: 1-5 - [c187]Holger Mandry, Sven Müelich, Joachim Becker, Robert F. H. Fischer, Maurits Ortmanns:
Using Polynomial Interpolation for Reproducing Multi-Valued Responses of Physical Unclonable Functions on FPGAs. ISCAS 2021: 1-5 - [c186]Michael Pietzko, Johannes Wagner, Ahmed Abdelaal, John G. Kauffman, Maurits Ortmanns:
Influence of Excess Loop Delay on the STF of Continuous-Time Delta-Sigma Modulators. ISCAS 2021: 1-5 - [c185]Johannes Wagner, Takashi Miki, Maurits Ortmanns:
Compensation of Finite GBW in CT Bandpass SDMs based on Single-OpAmp Resonators with Positive-Feedback. MWSCAS 2021: 284-287 - [c184]Jonathan Ungethüm, John G. Kauffman, Maurits Ortmanns:
Minimizing Signal-Dependent Residue in CT Pipelined ADCs. MWSCAS 2021: 567-570 - 2020
- [j39]Liang Qi, Ankesh Jain, Dongyang Jiang, Sai-Weng Sin, Rui Paulo Martins, Maurits Ortmanns:
A 76.6-dB-SNDR 50-MHz-BW 29.2-mW Multi-Bit CT Sturdy MASH With DAC Non-Linearity Tolerance. IEEE J. Solid State Circuits 55(2): 344-355 (2020) - [j38]Joschua Conrad, Patrick Vogelmann, Mohamed A. Mokhtar, Maurits Ortmanns:
Design Approach for Ring Amplifiers. IEEE Trans. Circuits Syst. 67-I(10): 3444-3457 (2020) - [j37]Patrick Vogelmann, Johannes Wagner, Maurits Ortmanns:
A 14b, Twofold Time-Interleaved Incremental ΔΣ ADC Using Hardware Sharing. IEEE Trans. Circuits Syst. 67-I(11): 3681-3692 (2020) - [j36]Johannes Wagner, Patrick Vogelmann, Maurits Ortmanns:
Performance Evaluation of Incremental Sigma-Delta ADCs Based on their NTF. IEEE Trans. Circuits Syst. 67-II(12): 2813-2817 (2020) - [j35]Holger Mandry, Andreas Herkle, Sven Müelich, Joachim Becker, Robert F. H. Fischer, Maurits Ortmanns:
Normalization and Multi-Valued Symbol Extraction From RO-PUFs for Enhanced Uniform Probability Distributions. IEEE Trans. Circuits Syst. 67-II(12): 3372-3376 (2020) - [c183]Johannes Wagner, Patrick Vogelmann, Maurits Ortmanns:
An Automated Design Environment for CT Incremental Sigma-Delta ADCs. ICECS 2020: 1-4 - [c182]Ahmed Abdelaal, John G. Kauffman, Mohamed A. Mokhtar, Maurits Ortmanns:
A Comparative Study of ISI Errors in Different DAC Structures for CT Delta-Sigma Modulators. ISCAS 2020: 1-5 - [c181]Navatouch Deeying, Maurits Ortmanns:
Feedback Receivers: Specification and State-of-the-Art Review. ISCAS 2020: 1-5 - [c180]Andreas Herkle, Holger Mandry, Joachim Becker, Maurits Ortmanns:
Live Demonstration: Generating FPGA Fingerprints Utilizing Full-Chip Characterization with Ring-Oscillator PUFs. ISCAS 2020: 1 - [c179]Andreas Herkle, Holger Mandry, Stefan Reich, Markus Sporer, Joachim Becker, Maurits Ortmanns:
Extracting Weak PUFs from Differential Nonlinearity of Digital-to-Analog Converters. ISCAS 2020: 1-5 - [c178]Andreas Herkle, Philipp Rossak, Holger Mandry, Joachim Becker, Maurits Ortmanns:
Comparison of Measurement and Readout Strategies for RO-PUFs on Xilinx Zynq-7000 SoC FPGAs. ISCAS 2020: 1-5 - [c177]Mohamed A. Mokhtar, Patrick Vogelmann, Ahmed Abdelaal, John G. Kauffman, Maurits Ortmanns:
FIR DACs in CT Incremental Delta-Sigma Modulators. ISCAS 2020: 1-5 - [c176]Stefan Reich, Markus Sporer, Maurits Ortmanns:
A Self-Compensated, Low-Offset Voltage Buffer for Input Impedance Boosting in Chopped Neural Front-Ends. ISCAS 2020: 1-5
2010 – 2019
- 2019
- [j34]Patrick Vogelmann, Johannes Wagner, Michael Haas, Maurits Ortmanns:
A Dynamic Power Reduction Technique for Incremental $\Delta\Sigma$ Modulators. IEEE J. Solid State Circuits 54(5): 1455-1467 (2019) - [j33]Antonios Nikas, Sreenivas Jambunathan, Leonhard Klein, Matthias Völker, Maurits Ortmanns:
A Continuous-Time Delta-Sigma Modulator Using a Modified Instrumentation Amplifier and Current Reuse DAC for Neural Recording. IEEE J. Solid State Circuits 54(10): 2879-2891 (2019) - [j32]Yanquan Luo, Ankesh Jain, Johannes Wagner, Maurits Ortmanns:
Input Referred Comparator Noise in SAR ADCs. IEEE Trans. Circuits Syst. II Express Briefs 66-II(5): 718-722 (2019) - [j31]Johannes Wagner, Patrick Vogelmann, Maurits Ortmanns:
On the Signal Filtering Property of CT Incremental Sigma-Delta ADCs. IEEE Trans. Circuits Syst. II Express Briefs 66-II(11): 1780-1784 (2019) - [c175]Mahdi Rajabzadeh, Jonathan Ungethuem, Andreas Herkle, Carolin Schilpp, M. Fauler, Oliver Wittekindt, Maurits Ortmanns:
A 24-Ch. Multi-Electrode Array Allowing Fast EIS to Determine Transepithelial Electrical Resistance. BioCAS 2019: 1-4 - [c174]Mohamed A. Mokhtar, Patrick Vogelmann, Michael Haas, Maurits Ortmanns:
A 94.3-dB SFDR, 91.5-dB DR, and 200-kS/s CT Incremental Delta-Sigma Modulator With Differentially Reset FIR Feedback. ESSCIRC 2019: 87-90 - [c173]Mahdi Rajabzadeh, Matthias Häberle, Ankesh Jain, Maurits Ortmanns:
An Integrated Readout for Current Sensing based on a Σ∆ Modulator with Switched Capacitor Feedback. ESSCIRC 2019: 321-324 - [c172]Andreas Herkle, Holger Mandry, Joachim Becker, Maurits Ortmanns:
In-depth Analysis and Enhancements of RO-PUFs with a Partial Reconfiguration Framework on Xilinx Zynq-7000 SoC FPGAs. HOST 2019: 238-247 - [c171]Matthias Häberle, Denis Djekic, Mahdi Rajabzadeh, Georg E. Fantner, Klaus Lips, Maurits Ortmanns, Jens Anders:
Comparison of Different Precision Pseudo Resistor Realizations in the DC-Feedback of Capacitive Transimpedance Amplifiers. ICECS 2019: 699-702 - [c170]Jiazuo Chi, Holger Mandry, Maurits Ortmanns:
Finite Gain-Bandwidth of Q Enhancement in Bandpass CT ΣΔ Modulator and Compensation. ISCAS 2019: 1-5 - [c169]Ankesh Jain, Ahmed Abdelaal, Maurits Ortmanns:
Effective Filtering of Requantization Error in Dual Quantized CTDSM using FIR DAC. ISCAS 2019: 1-5 - [c168]Holger Mandry, Andreas Herkle, Ludwig Kürzinger, Sven Müelich, Joachim Becker, Robert F. H. Fischer, Maurits Ortmanns:
Modular PUF Coding Chain with High-Speed Reed-Muller Decoder. ISCAS 2019: 1-5 - [c167]Mohamed A. Mokhtar, Patrick Vogelmann, Johannes Wagner, Maurits Ortmanns:
Incremental Sturdy-MASH Sigma-Delta Modulator with Reduced Sensitivity to DAC Mismatch. ISCAS 2019: 1-5 - [c166]Mahdi Rajabzadeh, Jonathan Ungethuem, Holger Mandry, Carolin Schilpp, Oliver Wittekindt, Maurits Ortmanns:
An Evaluation Study of Various Excitation Signals for Electrical Impedance Spectroscopy. ISCAS 2019: 1-5 - [c165]Liang Qi, Ankesh Jain, Dongyang Jiang, Sai-Weng Sin, Rui Paulo Martins, Maurits Ortmanns:
A 76.6dB-SNDR 50MHz-BW 29.2mW Noise-Coupling-Assisted CT Sturdy MASH ΔΣ Modulator with 1.5b/4b Quantizers in 28nm CMOS. ISSCC 2019: 336-338 - [c164]Mahdi Rajabzadeh, Matthias Häberle, Maurits Ortmanns:
Comparison of Direct Digitization Current Sensing Circuits for EIS. PRIME 2019: 117-120 - 2018
- [j30]Ahmad AlMarashli, Jens Anders, Joachim Becker, Maurits Ortmanns:
A Nyquist Rate SAR ADC Employing Incremental Sigma Delta DAC Achieving Peak SFDR = 107 dB at 80 kS/s. IEEE J. Solid State Circuits 53(5): 1493-1507 (2018) - [j29]Denis Djekic, Georg E. Fantner, Klaus Lips, Maurits Ortmanns, Jens Anders:
A 0.1% THD, 1-MΩ to 1-GΩ Tunable, Temperature-Compensated Transimpedance Amplifier Using a Multi-Element Pseudo-Resistor. IEEE J. Solid State Circuits 53(7): 1913-1923 (2018) - [j28]Lishan Lv, Ankesh Jain, Xiong Zhou, Joachim Becker, Qiang Li, Maurits Ortmanns:
A 0.4-V Gm-C Proportional-Integrator-Based Continuous-Time ΔΣ Modulator With 50-kHz BW and 74.4-dB SNDR. IEEE J. Solid State Circuits 53(11): 3256-3267 (2018) - [j27]Patrick Vogelmann, Johannes Wagner, Adrian Hänsler, Maurits Ortmanns:
Improved SQNR and MSA in Incremental ΔΣ Modulators by Using a Recuperation Phase. IEEE Trans. Circuits Syst. II Express Briefs 65-II(5): 557-561 (2018) - [c163]Michael Haas, Maurits Ortmanns:
Efficient implementation and stability analysis of a HV-CMOS current/voltage mode stimulator. BioCAS 2018: 1-4 - [c162]Antonios Nikas, Sreenivas Jambunathan, Leonhard Klein, Matthias Völker, Maurits Ortmanns:
A Low Distortion Continuous Time Sigma Delta Modulator using a High Input Impedance Instrumentation Amplifier for Neural Recording. BioCAS 2018: 1-4 - [c161]Matteo Pagin, Maurits Ortmanns:
Study of Compressed Sensing and Predictor Techniques for the Compression of Neural Signals under the Influence of Noise. EMBC 2018: 1102-1105 - [c160]Matthias Häberle, Denis Djekic, Georg E. Fantner, Klaus Lips, Maurits Ortmanns, Jens Anders:
An Integrator-Differentiator TIA Using a Multi-Element Pseudo-Resistor in its DC Servo Loop for Enhanced Noise Performance. ESSCIRC 2018: 294-297 - [c159]Benedikt Schlecker, Adrian P. Nievergelt, Maurits Ortmanns, Georg E. Fantner, Jens Anders:
An Analog High-Speed Single-Cycle Lock-in Amplifier for Next Generation AFM Experiments. IEEE SENSORS 2018: 1-4 - [c158]Johannes Wagner, Maurits Ortmanns:
Live Demonstration: Designing CT BP ΣΔ Modulators with www.sigma-delta.de. ISCAS 2018: 1- - [c157]Sebastian Bader, Maurits Ortmanns, Jens Anders:
Nonlinear Energy-Efficient Noise-Aware Design of CMOS LC Tank Oscillators. ISCAS 2018: 1-5 - [c156]Johannes Wagner, Maurits Ortmanns, José M. de la Rosa:
Man or Machine - Design Automation of Delta-Sigma Modulators. ISCAS 2018: 1-5 - [c155]Jiazuo Chi, Ankesh Jain, Jens Sauerbrey, Joachim Becker, Maurits Ortmanns:
Interferer Induced Jitter Reduction in Bandpass CT ΣΔ Modulators for Receiver Applications. ISCAS 2018: 1-4 - [c154]Andreas Herkle, Joachim Becker, Maurits Ortmanns:
An Arbiter PUF employing eye-opening oscillation for improved noise suppression. ISCAS 2018: 1-5 - [c153]Ankesh Jain, Maurits Ortmanns:
Gain Mismatch Insensitive Time-Interleaved DAC for CT Delta Sigma Modulator by application of a Three-State DAC. ISCAS 2018: 1-5 - [c152]Yanquan Luo, Liang Qi, Ankesh Jain, Maurits Ortmanns:
A High-Resolution Delta-Sigma D/A Converter Architecture with High Tolerance to DAC Mismatch. ISCAS 2018: 1-5 - [c151]Mahdi Rajabzadeh, Denis Djekic, Matthias Haeberle, Joachim Becker, Jens Anders, Maurits Ortmanns:
Comparison Study of Integrated Potentiostats: Resistive-TIA, Capacitive-TIA, CT ΣΔ Modulator. ISCAS 2018: 1-5 - [c150]Patrick Vogelmann, Michael Haas, Maurits Ortmanns:
A 1.1mW 200kS/s incremental ΔΣ ADC with a DR of 91.5dB using integrator slicing for dynamic power reduction. ISSCC 2018: 236-238 - [c149]Anh Chu, Benedikt Schlecker, Klaus Lips, Maurits Ortmanns, Jens Anders:
An 8-channel 13GHz ESR-on-a-Chip injection-locked vco-array achieving 200μM-concentration sensitivity. ISSCC 2018: 354-356 - [c148]Zoltan Nemes, Dominique Morche, Stéphane Le Tual, Maurits Ortmanns:
A Feasibility Study of Digital Beamforming for 5G mmWave Massive MIMO Base Station Receivers. NEWCAS 2018: 1-5 - [c147]Johannes Wagner, Patrick Vogelmann, Maurits Ortmanns:
On the Optimization of DT Incremental Sigma-Delta Modulators in Combination with CoI Reconstruction Filters. NGCAS 2018: 82-85 - [c146]Johannes Wagner, Felix Vogel, Florian Kuhm, Maurits Ortmanns:
Automated Synthesis of Subsampling CT Bandpass ΣΔ Modulators with Non-Idealities. NGCAS 2018: 90-93 - [c145]Alice Lanniel, Thomas Alpert, Tobias Boeser, Maurits Ortmanns:
Evaluation of Frontend Readout Circuits for High Performance Automotive MEMS Accelerometers. PRIME 2018: 229-232 - 2017
- [j26]Jonas Handwerker, Benedikt Schlecker, Maurits Ortmanns, Jens Anders:
Integrated Circuit Technology for Next Generation Point-of-Care Spectroscopy Applications. IEEE Commun. Mag. 55(10): 143-151 (2017) - [c144]Jens Anders, Sebastian Bader, Markus Dietl, Puneet Sareen, G. Rombach, Sotirios Tambouris, Maurits Ortmanns:
A -245 dB FOM 48 fs rms jitter semi-digital PLL with intrinsic temperature compensation in 130 nm CMOS. A-SSCC 2017: 325-328 - [c143]Joachim Becker, David Pellhammer, Patrick Preisner, Julia C. Gloggler, Bernd G. Lapatki, Maurits Ortmanns:
An implant for wireless in situ measurement of lip pressure with 12 sensors. BioCAS 2017: 1-4 - [c142]Anh Chu, Benedikt Schlecker, Jonas Handwerker, Silvio Künstner, Maurits Ortmanns, Klaus Lips, Jens Anders:
VCO-based ESR-on-a-chip as a tool for low-cost, high-sensitivity food quality control. BioCAS 2017: 1-4 - [c141]Anh Chu, Benedikt Schlecker, Jonas Handwerker, Silvio Künstner, Maurits Ortmanns, Klaus Lips, Jens Anders:
Live demonstration: A VCO-based point-of-care ESR spectrometer. BioCAS 2017: 1 - [c140]Matteo Pagin, Maurits Ortmanns:
A neural data lossless compression scheme based on spatial and temporal prediction. BioCAS 2017: 1-4 - [c139]Mahdi Rajabzadeh, Joachim Becker, Maurits Ortmanns:
Evaluation of single-bit sigma-delta modulator DAC for electrical impedance spectroscopy. BioCAS 2017: 1-4 - [c138]Michael Haas, Benedikt Schweizer, Jens Anders, Maurits Ortmanns:
A miniaturized UWB antenna for implantable data telemetry. EMBC 2017: 1086-1089 - [c137]Matteo Pagin, Maurits Ortmanns:
Evaluation of logarithmic vs. linear ADCs for neural signal acquisition and reconstruction. EMBC 2017: 4387-4390 - [c136]Denis Djekic, Georg E. Fantner, Jan Behrends, Klaus Lips, Maurits Ortmanns, Jens Anders:
A transimpedance amplifier using a widely tunable PVT-independent pseudo-resistor for high-performance current sensing applications. ESSCIRC 2017: 79-82 - [c135]Benedikt Schlecker, Anh Chu, Jonas Handwerker, S. Kiinstner, Maurits Ortmanns, Klaus Lips, Jens Anders:
VCO-based ESR-on-a-chip as a tool for low-cost, high-sensitivity point-of-care diagnostics. IEEE SENSORS 2017: 1-3 - [c134]Benedikt Schlecker, Anh Chu, Jonas Handwerker, Silvio Künstner, Maurits Ortmanns, Klaus Lips, Jens Anders:
Live demonstration: A VCO-based point-of-care ESR spectrometer. IEEE SENSORS 2017: 1 - [c133]Jiazuo Chi, Johannes Wagner, Jens Anders, Maurits Ortmanns:
Digital interferer suppression and jitter reduction in continuous-time bandpass ΣΔ modulators. ISCAS 2017: 1-4 - [c132]Jonas Handwerker, Marlon Perez-Rodas, Maurits Ortmanns, Klaus Scheffler, Jens Anders:
Towards CMOS-based in-vivo NMR spectroscopy and microscopy. ISCAS 2017: 1-4 - [c131]Johannes Wagner, Jiazuo Chi, Maurits Ortmanns:
Designing CT bandpass ΣΔ modulators with arbitrary STF shapes. ISCAS 2017: 1-4 - [c130]Matteo Pagin, Joachim Becker, Maurits Ortmanns:
Evaluation of spike sorting and compression for digitally reconfigurable non-uniform quantization. NEWCAS 2017: 177-180 - 2016
- [j25]Rudolf Ritter, John G. Kauffman, Joachim Becker, Maurits Ortmanns:
A 10 MHz Bandwidth, 70 dB SNDR Continuous Time Delta-Sigma Modulator With Digitally Improved Reconfigurable Blocker Rejection. IEEE J. Solid State Circuits 51(3): 660-670 (2016) - [j24]Andreas Herkle, Joachim Becker, Maurits Ortmanns:
Exploiting Weak PUFs From Data Converter Nonlinearity - E.g., A Multibit CT ΔΣ Modulator. IEEE Trans. Circuits Syst. I Regul. Pap. 63-I(7): 994-1004 (2016) - [c129]Michael Haas, Jens Anders, Maurits Ortmanns:
A bidirectional neural interface featuring a tunable recorder and electrode impedance estimation. BioCAS 2016: 372-375 - [c128]Jonas Handwerker, M. Eder, M. Tibiletti, Volker Rasche, Klaus Scheffler, Joachim Becker, Maurits Ortmanns, Jens Anders:
An array of fully-integrated quadrature TX/RX NMR field probes for MRI trajectory mapping. ESSCIRC 2016: 217-220 - [c127]Joachim Becker, Jens Anders, Maurits Ortmanns:
A continuous-time field programmable analog array with 1 GHz GBW. ICECS 2016: 209-212 - [c126]Johannes Wagner, Maurits Ortmanns:
Designing CT ΣΔ modulators with www.sigma-delta.de. ICECS 2016: 442 - [c125]Johannes Wagner, Stefan Reich, Rudolf Ritter, Jens Anders, Maurits Ortmanns:
Finite GBW in single OpAmp CT ΣΔ modulators. ICECS 2016: 468-471 - [c124]Jiazuo Chi, Rudolf Ritter, Johannes Wagner, Jens Anders, Maurits Ortmanns:
Phase noise vs. jitter analysis in continuous-time LP and BP ΣΔ modulators with interferers. ICECS 2016: 476-479 - [c123]Johannes Wagner, Jiazuo Chi, Maurits Ortmanns:
Designing CT ΣΔ modulators with shaped feedback waveforms using www.sigma-delta.de. ICECS 2016: 480-483 - [c122]Andreas Herkle, Markus Schuster, Joachim Becker, Maurits Ortmanns:
Enhanced Arbiter PUFs using custom sized structures for reduced noise sensitivity. ICECS 2016: 568-571 - [c121]Denis Djekic, Maurits Ortmanns, Georg E. Fantner, Jens Anders:
A tunable, robust pseudo-resistor with enhanced linearity for scanning ion-conductance microscopy. ISCAS 2016: 842-845 - [c120]Ahmad AlMarashli, Jens Anders, Maurits Ortmanns:
A hybrid comparator for high resolution SAR ADC. ISCAS 2016: 1050-1053 - [c119]Johannes Wagner, Rudolf Ritter, Maurits Ortmanns:
Using www.sigma-delta.de to rapidly obtain ELD compensated CT ΣΔ modulators. ISCAS 2016: 1498-1501 - [c118]Michael Haas, Ulrich Bihr, Jens Anders, Maurits Ortmanns:
A bidirectional neural interface IC with high voltage compliance and spectral separation. ISCAS 2016: 2743-2746 - [c117]Jonas Handwerker, Benedikt Schlecker, Ulrich Wachter, Peter Radermacher, Maurits Ortmanns, Jens Anders:
28.2 A 14GHz battery-operated point-of-care ESR spectrometer based on a 0.13µm CMOS ASIC. ISSCC 2016: 476-477 - [c116]Makoto Ikeda, David Stoppa, Michiel A. P. Pertijs, Yusuke Oike, Maurits Ortmanns, Vadim Ivanov, Fu-Lung Hsueh:
F5: Advanced IC design for ultra-low-noise sensing. ISSCC 2016: 506-509 - 2015
- [j23]Rudolf Ritter, Maurits Ortmanns:
Continuous-Time Delta-Sigma ADCs With Improved Interferer Rejection. IEEE J. Emerg. Sel. Topics Circuits Syst. 5(4): 500-513 (2015) - [j22]Matthias Lorenz, Rudolf Ritter, Jens Anders, Maurits Ortmanns:
Estimation of Non-Idealities in Sigma-Delta Modulators for Test and Correction Using Unscented Kalman Filters. IEEE Trans. Circuits Syst. I Regul. Pap. 62-I(5): 1240-1249 (2015) - [c115]Rudolf Ritter, Patrick Torta, Lukas Dörrer, Antonio Di Giandomenico, Stefan Herzinger, Maurits Ortmanns:
A multimode CT ΔΣ-modulator with a reconfigurable digital feedback filter for semi-digital blocker/interferer rejection. ESSCIRC 2015: 225-228 - [c114]Rudolf Ritter, Matthias Lorenz, Maurits Ortmanns:
Anti-aliasing filter improvement in continuous-time feedback sigma-delta modulators. ISCAS 2015: 325-328 - [c113]Chao Chu, Jens Anders, Joachim Becker, Maurits Ortmanns:
Finite GBW compensation technique for CT ΔΣ modulators with differentiator based ELD compensation. NEWCAS 2015: 1-4 - [c112]Abdelrahman Elkafrawy, Jens Anders, Maurits Ortmanns:
A 10-bit reference free current mode SAR ADC with 58.4 dB SFDR at 50 MS/s in 90 nm CMOS. NORCAS 2015: 1-4 - [c111]S. Fahmy, Markus Dietl, Puneet Sareen, Maurits Ortmanns, Jens Anders:
A BW-tracking semi-digital PLL with near-optimal VCO phase noise shaping in low-cost 0.4 µm CMOS achieving 700 fs rms phase jitter. NORCAS 2015: 1-4 - 2014
- [j21]John G. Kauffman, Pascal Witte, Matthias Lehmann, Joachim Becker, Yiannos Manoli, Maurits Ortmanns:
A 72 dB DR, CT ΔΣ Modulator Using Digitally Estimated, Auxiliary DAC Linearization Achieving 88 fJ/conv-step in a 25 MHz BW. IEEE J. Solid State Circuits 49(2): 392-404 (2014) - [j20]Benedikt Schlecker, Maja Dukic, Blake Erickson, Maurits Ortmanns, Georg E. Fantner, Jens Anders:
Single-Cycle-PLL Detection for Real-Time FM-AFM Applications. IEEE Trans. Biomed. Circuits Syst. 8(2): 206-215 (2014) - [j19]Timon Brückner, Christoph Zorn, Jens Anders, Joachim Becker, Wolfgang Mathis, Maurits Ortmanns:
A GPU-Accelerated Web-Based Synthesis Tool for CT Sigma-Delta Modulators. IEEE Trans. Circuits Syst. I Regul. Pap. 61-I(5): 1429-1441 (2014) - [j18]Matthias Lorenz, Rudolf Ritter, Joachim Becker, Maurits Ortmanns:
A Genetic Algorithm for the Estimation of Nonidealities in Continuous-Time Sigma-Delta Modulators. IEEE Trans. Circuits Syst. II Express Briefs 61-II(6): 388-392 (2014) - [j17]Matthias Völker, Sara Pashmineh, Johann Hauer, Maurits Ortmanns:
Current Feedback Linearization Applied to Oscillator Based ADCs. IEEE Trans. Circuits Syst. I Regul. Pap. 61-I(11): 3066-3074 (2014) - [c110]Tianyi Liu, Ulrich Bihr, Joachim Becker, Jens Anders, Maurits Ortmanns:
Live demonstration: In vivo verification of a 100 Mbps transcutaneous optical telemetric link. BioCAS 2014: 186 - [c109]Tianyi Liu, Ulrich Bihr, Joachim Becker, Jens Anders, Maurits Ortmanns:
In vivo verification of a 100 Mbps transcutaneous optical telemetric link. BioCAS 2014: 580-583 - [c108]Ulrich Bihr, Jens Anders, J. Rickert, Martin Schuettler, A. Moeller, K. H. Boven, Joachim Becker, Maurits Ortmanns:
A neural recorder IC with HV input multiplexer for voltage and current stimulation with 18V compliance. ESSCIRC 2014: 103-106 - [c107]Emilia Noorsal, Kriangkrai Sooksood, Hongcheng Xu, Deepti Sukumaran, Maurits Ortmanns:
Multistimulator backchannel communication link implemented for safety information and closed-loop power management. ICCSCE 2014: 647-651 - [c106]Ahmad AlMarashli, Jens Anders, Maurits Ortmanns:
Employing incremental sigma delta DACs for high resolution SAR ADC. ICECS 2014: 132-135 - [c105]Abdelrahman Elkafrawy, Ahmad AlMarashli, Rudolf Ritter, Jens Anders, Maurits Ortmanns:
Design of a high linearity Gm stage for a high speed current mode SAR ADC. ICECS 2014: 136-139 - [c104]Hongcheng Xu, Matthias Lorenz, Ulrich Bihr, Jens Anders, Maurits Ortmanns:
Wide-band efficiency-enhanced CMOS rectifier. ISCAS 2014: 614-617 - [c103]Tianyi Liu, Ulrich Bihr, Jens Anders, Maurits Ortmanns:
Performance evaluation of a low power optical wireless link for biomedical data transfer. ISCAS 2014: 870-873 - [c102]Matthias Lorenz, Timon Brückner, Rudolf Ritter, Jens Anders, Maurits Ortmanns:
A square root unscented Kalman filter for estimating DAC and loopfilter nonidealities in continuous-time sigma-delta modulators. ISCAS 2014: 1159-1162 - [c101]Abdelrahman Elkafrawy, Jens Anders, Maurits Ortmanns:
A high resolution transimpedance amplifier for use in a 10-bit 200 MS/s current mode SAR ADC. MWSCAS 2014: 1057-1060 - [c100]Matthias Lorenz, Michael Maurer, Yiannos Manoli, Maurits Ortmanns:
A spherical simplex unscented Kalman filter with smart sigma-point processing for estimations in CT ΣΔ modulators. NEWCAS 2014: 97-100 - [c99]Rudolf Ritter, Matthias Lorenz, Chao Chu, Maurits Ortmanns:
A high open loop gain common mode feedback technique for fully differential amplifiers. NEWCAS 2014: 261-264 - [c98]Ulrich Bihr, Hongcheng Xu, Christoph Bulach, Matthias Lorenz, Jens Anders, Maurits Ortmanns:
Real-time data compression of neural spikes. NEWCAS 2014: 436-439 - [c97]Chao Chu, John G. Kauffman, Jens Anders, Joachim Becker, Maurits Ortmanns, Michael Epp, Sebastien Chartier:
A 1.92-GS/s CT ΔΣ modulator with 70-db DR and 78-db SFDR in 15-MHz bandwidth. NEWCAS 2014: 480-483 - 2013
- [j16]Maurits Ortmanns, Timothy C. Fischer, Uming Ko, Wim Dehaene, Yasuhiro Takai:
Introduction to the Special Issue on the 2012 IEEE International Solid-State Circuits Conference. IEEE J. Solid State Circuits 48(1): 3-7 (2013) - [c96]Jonas Handwerker, Maurits Ortmanns, Jens Anders, Martin Eschelbach, Paul Chang, Anke Henning, Klaus Scheffler:
An active TX/RX NMR probe for real-time monitoring of MRI field imperfections. BioCAS 2013: 194-197 - [c95]Tianyi Liu, Jens Anders, Maurits Ortmanns:
Design optimization of the optical receiver in transcutaneous telemetric links. BioCAS 2013: 346-349 - [c94]Jens Anders, Maurits Ortmanns:
Frequency noise of CMOS LC tank oscillators operating in weak inversion. ECCTD 2013: 1-4 - [c93]Sara Pashmineh, Stefan Bramburger, Hongcheng Xu, Maurits Ortmanns, Dirk Killat:
An LDO using stacked transistors on 65 nm CMOS. ECCTD 2013: 1-4 - [c92]Benedikt Schlecker, Maurits Ortmanns, Jens Anders, Georg E. Fantner:
Novel electronics for high-speed FM-AFM in life science applications. ECCTD 2013: 1-4 - [c91]Christoph Zorn, Tina Thiessen, Timon Brückner, Maurits Ortmanns, Wolfgang Mathis:
State space analysis of mixed signal systems with switched feedback and delay. ECCTD 2013: 1-4 - [c90]Abdelrahman Elkafrawy, Jens Anders, Timon Brückner, Maurits Ortmanns:
Design of a current steering DAC for a high speed current mode SAR ADC. ICECS 2013: 441-444 - [c89]Matthias Lorenz, Timon Brückner, Jens Anders, Maurits Ortmanns:
An advanced unscented Kalman filter algorithm for parameter estimation in continuous-time sigma-delta modulators. ICECS 2013: 545-548 - [c88]Timon Brückner, Martin Kiebler, Matthias Lorenz, Christoph Zorn, Jens Anders, Wolfgang Mathis, Maurits Ortmanns:
Discrete-time simulation of continuous-time ΣΔ modulators with arbitrary input signals. ICECS 2013: 549-552 - [c87]Benedikt Schlecker, Maurits Ortmanns, Jens Anders, Georg E. Fantner:
PLL-based high-speed demodulation of FM signals for real-time AFM applications. ISCAS 2013: 197-200 - [c86]Ulrich Bihr, Thomas Ungru, Hongcheng Xu, Jens Anders, Joachim Becker, Maurits Ortmanns:
A bidirectional neural interface with a HV stimulator and a LV neural amplifier. ISCAS 2013: 401-404 - [c85]John G. Kauffman, Rudolf Ritter, Chao Chu, Maurits Ortmanns:
A DAC cell with improved ISI and noise performance using native switching for multi-bit CT Delta Sigma modulators. ISCAS 2013: 574-577 - [c84]Hongcheng Xu, Ulrich Bihr, Joachim Becker, Maurits Ortmanns:
A multi-channel neural stimulator with resonance compensated inductive receiver and closed-loop smart power management. ISCAS 2013: 638-641 - [c83]Tianyi Liu, Jens Anders, Maurits Ortmanns:
System level model for transcutaneous optical telemetric link. ISCAS 2013: 865-868 - [c82]Matthias Lorenz, Timon Brückner, Rudolf Ritter, Maurits Ortmanns:
Concurrent estimation of amplifier nonidealities and excess loop delay in continuous-time sigma-delta modulators. ISCAS 2013: 1031-1034 - [c81]Timon Brückner, Martin Kiebler, Matthias Lorenz, Christoph Zorn, Wolfgang Mathis, Maurits Ortmanns:
Calculating transfer functions of CT sigma-delta modulators with arbitrary DAC waveforms. ISCAS 2013: 1264-1267 - [c80]Chao Chu, Timon Brückner, John G. Kauffman, Jens Anders, Joachim Becker, Maurits Ortmanns:
Analysis and design of high speed/high linearity continuous time delta-sigma modulator. ISCAS 2013: 1268-1271 - [c79]John G. Kauffman, Rudolf Ritter, Chao Chu, Joachim Becker, Maurits Ortmanns:
Low power quantizer design in CT Delta Sigma modulators. ISCAS 2013: 1990-1993 - [c78]Rudolf Ritter, John G. Kauffman, Matthias Lorenz, Maurits Ortmanns:
Integrator swing reduction in feedback compensated Sigma-Delta modulators. ISCAS 2013: 2026-2029 - [c77]Sara Pashmineh, Hongcheng Xu, Maurits Ortmanns, Dirk Killat:
Design of high speed high-voltage drivers based on stacked standard CMOS for various supply voltages. MWSCAS 2013: 529-532 - 2012
- [j15]Emilia Noorsal, Kriangkrai Sooksood, Hongcheng Xu, Ralf Hornig, Joachim Becker, Maurits Ortmanns:
A Neural Stimulator Frontend With High-Voltage Compliance and Programmable Pulse Shape for Epiretinal Implants. IEEE J. Solid State Circuits 47(1): 244-256 (2012) - [j14]Timon Brückner, Matthias Lorenz, Christoph Zorn, Joachim Becker, Wolfgang Mathis, Maurits Ortmanns:
Hardware-Accelerated Simulation Environment for CT Sigma-Delta Modulators Using an FPGA. IEEE Trans. Circuits Syst. II Express Briefs 59-II(8): 471-475 (2012) - [c76]Kriangkrai Sooksood, Emilia Noorsal, Ulrich Bihr, Maurits Ortmanns:
Recent advances in power efficient output stage for high density implantable stimulators. EMBC 2012: 855-858 - [c75]Juan S. Ordonez, Martin Schuettler, Maurits Ortmanns, Thomas Stieglitz:
A 232-channel retinal vision prosthesis with a miniaturized hermetic package. EMBC 2012: 2796-2799 - [c74]Christoph Bulach, Ulrich Bihr, Maurits Ortmanns:
Evaluation study of compressed sensing for neural spike recordings. EMBC 2012: 3507-3510 - [c73]Tianyi Liu, Ulrich Bihr, Syed M. Anis, Maurits Ortmanns:
Optical transcutaneous link for low power, high data rate telemetry. EMBC 2012: 3535-3538 - [c72]Emilia Noorsal, Kriangkrai Sooksood, Ulrich Bihr, Joachim Becker, Maurits Ortmanns:
Distributed clock gating for power reduction of a programmable waveform generator for neural stimulation. EMBC 2012: 3878-3881 - [c71]Ali Zahabi, Muhammad Anis, Maurits Ortmanns:
A 9.6 GS/s 112 mW 58 dB DR 150 MHz bandwidth RF bandpass transmission line ΣΔ modulator. ESSCIRC 2012: 217-220 - [c70]Hongcheng Xu, Emilia Noorsal, Kriangkrai Sooksood, Joachim Becker, Maurits Ortmanns:
A multichannel neurostimulator with transcutaneous closed-loop power control and self-adaptive supply. ESSCIRC 2012: 309-312 - [c69]Christoph Bulach, Ulrich Bihr, Maurits Ortmanns:
Evaluating the influence of the bit error rate on the information of neural spike signals. ICECS 2012: 21-24 - [c68]Christoph Zorn, Timon Brückner, Maurits Ortmanns, Wolfgang Mathis:
Performance tuning of multi-bit continuous time ΣΔ-modulators using a switched system model. ICECS 2012: 420-423 - [c67]Matthias Lorenz, Michael Maurer, Yiannos Manoli, Maurits Ortmanns:
Joint estimation of filter nonidealities in continuous-time sigma-delta modulators by using an unscented Kalman filter. ICECS 2012: 428-431 - [c66]Timon Brückner, Martin Kiebler, Christoph Zorn, Wolfgang Mathis, Maurits Ortmanns:
Discrete-time simulation of arbitrary digital/analog converter waveforms in continuous-time sigma-delta modulators. ICECS 2012: 432-435 - [c65]Pascal Witte, John G. Kauffman, Timon Brückner, Joachim Becker, Maurits Ortmanns:
An error estimation technique for lowpass and bandpass ΣΔ ADC feedback DACs using a residual test signal. ISCAS 2012: 73-76 - [c64]Ali Zahabi, Farabi Ibne Jamal, Joachim Becker, Muhammad Anis, Maurits Ortmanns:
Digitally-switched resonators for bandpass integrated transmission line ΣΔ modulators. ISCAS 2012: 297-300 - [c63]Ali Zahabi, Muhammad Anis, Maurits Ortmanns:
2.4GHz super-regeneration amplifier with degenerative quenching technique for RF-pulse width transceiver. ISCAS 2012: 2147-2150 - [c62]Ulrich Bihr, Maurits Ortmanns:
A front-end circuit with active spike and LFP separation via a switched capacitor filter structure for neural recording applications. ISCAS 2012: 2231-2234 - [c61]Hongcheng Xu, Maurits Ortmanns:
A new class of integrated CMOS rectifiers with improved PVT-compensated efficiency. ISCAS 2012: 2259-2262 - [c60]Christoph Zorn, Christian Widemann, Timon Brückner, Maurits Ortmanns, Wolfgang Mathis:
Peaking reduced STF design for CT ΣΔ modulators with selective pole compensation. ISCAS 2012: 3134-3137 - [c59]Rudolf Ritter, John G. Kauffman, Maurits Ortmanns:
A power efficient MDAC design with correlated double sampling for a 2-step-flash ADC. ISCAS 2012: 3138-3141 - [c58]Pascal Witte, John G. Kauffman, Joachim Becker, Yiannos Manoli, Maurits Ortmanns:
A 72dB-DR ΔΣ CT modulator using digitally estimated auxiliary DAC linearization achieving 88fJ/conv in a 25MHz BW. ISSCC 2012: 154-156 - [c57]Christoph Hagleitner, Maurits Ortmanns:
Session 11 overview: Sensors and MEMS: Imagers, MEMS, medical and displays subcommittee. ISSCC 2012: 194-195 - [c56]John G. Kauffman, Timon Brückner, Maurits Ortmanns:
PVT robust design of wideband CT delta sigma modulators including finite GBW compensation. MWSCAS 2012: 382-385 - [c55]Ali Zahabi, Muhammad Anis, Maurits Ortmanns:
A power/area-starved complementary-cross-coupled filter for integrated transmission line ΣΔ modulators. MWSCAS 2012: 806-809 - [c54]Daniel Angele, Martin Stein, John G. Kauffman, Maurits Ortmanns, Joachim Becker:
A reconfigurable Continuous-Time ΔΣ-ADC using a digitally programmable gm-C array. MWSCAS 2012: 810-813 - [c53]Ali Zahabi, Muhammad Anis, Maurits Ortmanns:
Near field inductive coupled tuning technique for RF bandpass ΣΔ modulators. MWSCAS 2012: 1112-1115 - [c52]Ali Zahabi, Muhammad Anis, Maurits Ortmanns:
Integrated transmission lines for complementary cross-coupled bandpass filters in ΣΔ modulators. NEWCAS 2012: 241-244 - 2011
- [j13]John G. Kauffman, Pascal Witte, Joachim Becker, Maurits Ortmanns:
An 8.5 mW Continuous-Time ΔΣ Modulator With 25 MHz Bandwidth Using Digital Background DAC Linearization to Achieve 63.5 dB SNDR and 81 dB SFDR. IEEE J. Solid State Circuits 46(12): 2869-2881 (2011) - [j12]Pascal Witte, John G. Kauffman, Joachim Becker, Maurits Ortmanns:
A Correlation-Based Background Error Estimation Technique for Bandpass Delta-Sigma ADC DACs. IEEE Trans. Circuits Syst. II Express Briefs 58-II(11): 748-752 (2011) - [j11]Hongcheng Xu, Maurits Ortmanns:
A Temperature and Process Compensated Ultralow-Voltage Rectifier in Standard Threshold CMOS for Energy-Harvesting Applications. IEEE Trans. Circuits Syst. II Express Briefs 58-II(12): 812-816 (2011) - [c51]Christoph Zorn, Christian Widemann, Timon Brückner, Maurits Ortmanns, Wolfgang Mathis:
STF optimization of 1-bit CT ΣΔ modulators based on scaled loop filter coefficients. ECCTD 2011: 266-269 - [c50]Ali Zahabi, Muhammad Anis, Maurits Ortmanns:
3.1GHz-3.8GHz integrated transmission line super-regeneration amplifier with degenerative quenching technique for impulse-FM-UWB transceiver. ESSCIRC 2011: 387-390 - [c49]Christoph Zorn, Sebastian Stegemann, Timon Brückner, Maurits Ortmanns, Wolfgang Mathis:
A novel optimization method for CT sigma-delta-modulators using a switched system model. ISCAS 2011: 1848-1851 - [c48]Steffen Lange, Hongcheng Xu, Christian Lang, Holger Pless, Joachim Becker, Hans-Jürgen Tiedkte, Eckhard Hennig, Maurits Ortmanns:
An AC-powered optical receiver consuming 270μW for transcutaneous 2Mb/s data transfer. ISSCC 2011: 304-306 - [c47]Kriangkrai Sooksood, Emilia Noorsal, Joachim Becker, Maurits Ortmanns:
A neural stimulator front-end with arbitrary pulse shape, HV compliance and adaptive supply requiring 0.05mm2 in 0.35μm HVCMOS. ISSCC 2011: 306-308 - [c46]John G. Kauffman, Pascal Witte, Joachim Becker, Maurits Ortmanns:
An 8mW 50MS/s CT ΔΣ modulator with 81dB SFDR and digital background DAC linearization. ISSCC 2011: 472-474 - 2010
- [j10]Kriangkrai Sooksood, Thomas Stieglitz, Maurits Ortmanns:
An Active Approach for Charge Balancing in Functional Electrical Stimulation. IEEE Trans. Biomed. Circuits Syst. 4(3): 162-170 (2010) - [j9]Pascal Witte, Maurits Ortmanns:
Background DAC Error Estimation Using a Pseudo Random Noise Based Correlation Technique for Sigma-Delta Analog-to-Digital Converters. IEEE Trans. Circuits Syst. I Regul. Pap. 57-I(7): 1500-1512 (2010) - [c45]Jens Sauerbrey, Jacinto San Pablo Garcia, Georgi Panov, Thomas Piorek, Xianghua Shen, Markus Schimper, Rudolf Koch, Matthias Keller, Yiannos Manoli, Maurits Ortmanns:
A configurable cascaded continuous-time ΔΣ modulator with up to 15MHz bandwidth. ESSCIRC 2010: 426-429 - [c44]Muhammad Anis, Maurits Ortmanns, Norbert Wehn:
RF spectrum sensing technique for cognitive UWB radio network. ESSCIRC 2010: 506-509 - [c43]Muhammad Anis, Maurits Ortmanns, Norbert Wehn:
Fully integrated UWB impulse transmitter and 402-to-405MHz super-regenerative receiver for medical implant devices. ISCAS 2010: 1213-1215 - [c42]Ali Zahabi, Maurits Ortmanns:
Study on integrated transmission line ΣΔ modulators. ISCAS 2010: 2151-2154 - [c41]Pascal Witte, Carsten Noeske, Maurits Ortmanns:
Hardware complexity of a correlation based background DAC error estimation technique for sigma-delta ADCs. ISCAS 2010: 2167-2170
2000 – 2009
- 2009
- [c40]Fabian Henrici, Joachim Becker, Stanis Trendelenburg, Daniel DeDorigo, Maurits Ortmanns, Yiannos Manoli:
A Field Programmable Analog Array using Floating Gates for High Resolution Tuning. ISCAS 2009: 265-268 - [c39]Kriangkrai Sooksood, Thomas Stieglitz, Maurits Ortmanns:
An Active Approach for Charge Balancing in Functional Electrical Stimulation. ISCAS 2009: 341-344 - [c38]Christian Peters, Jonas Handwerker, Fabian Henrici, Maurits Ortmanns, Yiannos Manoli:
Experimental Results on Power Efficient Single-poly Floating Gate Rectifiers. ISCAS 2009: 1097-1100 - [c37]Pascal Witte, Maurits Ortmanns:
A Background DAC Error Estimation in Sigma-Delta ADCs using a Pseudo Random Noise based Correlation Technique. ISCAS 2009: 1549-1552 - 2008
- [j8]Joachim Becker, Fabian Henrici, Stanis Trendelenburg, Maurits Ortmanns, Yiannos Manoli:
A Field-Programmable Analog Array of 55 Digitally Tunable OTAs in a Hexagonal Lattice. IEEE J. Solid State Circuits 43(12): 2759-2768 (2008) - [j7]Matthias Keller, Alexander Buhmann, Jens Sauerbrey, Maurits Ortmanns, Yiannos Manoli:
A Comparative Study on Excess-Loop-Delay Compensation Techniques for Continuous-Time Sigma-Delta Modulators. IEEE Trans. Circuits Syst. I Regul. Pap. 55-I(11): 3480-3487 (2008) - [c36]Sherif Ahmed Saleh Mohamed, Maurits Ortmanns, Yiannos Manoli:
Design of current reuse CMOS LC-VCO. ICECS 2008: 714-717 - [c35]Jens Anders, Wolfgang Mathis, Maurits Ortmanns:
A new optimization approach for the automatic design of SigmaDelta-modulators. ISCAS 2008: 1432-1435 - [c34]Matthias Keller, Alexander Buhmann, Maurits Ortmanns, Yiannos Manoli:
Analysis of digital gain error compensation in continuous-time cascaded sigma-delta modulators. ISCAS 2008: 1874-1877 - [c33]Christian Peters, Fabian Henrici, Maurits Ortmanns, Yiannos Manoli:
High-bandwidth floating gate CMOS rectifiers with reduced voltage drop. ISCAS 2008: 2598-2601 - [c32]Joachim Becker, Fabian Henrici, Stanis Trendelenburg, Maurits Ortmanns, Yiannos Manoli:
A hexagonal Field Programmable Analog Array consisting of 55 digitally tunable OTAs. ISCAS 2008: 2897-2900 - [c31]Niklas Lotze, Maurits Ortmanns, Yiannos Manoli:
Variability of flip-flop timing at sub-threshold voltages. ISLPED 2008: 221-224 - [c30]Joachim Becker, Fabian Henrici, Stanis Trendelenburg, Maurits Ortmanns, Yiannos Manoli:
A Continuous-Time Hexagonal Field-Programmable Analog Array in 0.13μm CMOS with 186MHz GBW. ISSCC 2008: 70-71 - 2007
- [j6]Maurits Ortmanns, André Rocke, Marcus Gehrke, Hans-Jürgen Tiedtke:
A 232-Channel Epiretinal Stimulator ASIC. IEEE J. Solid State Circuits 42(12): 2946-2959 (2007) - [j5]Matthias Keller, Alexander Buhmann, Friedel Gerfers, Maurits Ortmanns, Yiannos Manoli:
On the Implicit Anti-Aliasing Feature of Continuous-Time Cascaded Sigma-Delta Modulators. IEEE Trans. Circuits Syst. I Regul. Pap. 54-I(12): 2639-2645 (2007) - [c29]Sherif Ahmed Saleh Mohamed, Maurits Ortmanns, Yiannos Manoli:
A comparative study of CMOS LNAs. ECCTD 2007: 76-79 - [c28]Niklas Lotze, Maurits Ortmanns, Yiannos Manoli:
A Study on self-timed asynchronous subthreshold logic. ICCD 2007: 533-540 - [c27]Matthias Keller, Alexander Buhmann, Maurits Ortmanns, Yiannos Manoli:
A Method for the Discrete-Time Simulation of Continuous-Time Sigma-Delta Modulators. ISCAS 2007: 241-244 - [c26]Maurits Ortmanns:
Charge Balancing in Functional Electrical Stimulators: A Comparative Study. ISCAS 2007: 573-576 - [c25]Matthias Keller, Alexander Buhmann, Maurits Ortmanns, Yiannos Manoli:
On the Implicit Anti-Aliasing Feature of Continuous-Time Multistage Noise-Shaping Sigma-Delta Modulators. ISCAS 2007: 721-724 - [c24]Fabian Henrici, Joachim Becker, Alexander Buhmann, Maurits Ortmanns, Yiannos Manoli:
A Continuous-Time Field Programmable Analog Array Using Parasitic Capacitance Gm-C Filters. ISCAS 2007: 2236-2239 - [c23]Alexander Buhmann, Matthias Keller, Maurits Ortmanns, Yiannos Manoli:
Estimating Circuit Nonidealities of Continuous-Time Multibit Delta-Sigma Modulators. ISCAS 2007: 2264-2267 - [c22]Christian Peters, O. Kessling, Fabian Henrici, Maurits Ortmanns, Yiannos Manoli:
CMOS Integrated Highly Efficient Full Wave Rectifier. ISCAS 2007: 2415-2418 - [c21]Maurits Ortmanns, N. Linger, André Rocke, S. Rackow, Marcus Gehrke, Hans-Jürgen Tiedtke:
A 232-Channel Visual Prosthesis ASIC with Production-Compliant Safety and Testability. ISSCC 2007: 152-593 - 2006
- [c20]Friedel Gerfers, Maurits Ortmanns, P. Schmitz:
A transistor-based clock jitter insensitive DAC architecture. ISCAS 2006 - [c19]Maurits Ortmanns, N. Unger, André Rocke, Marcus Gehrke, Hans-Jürgen Tiedtke:
A retina stimulator ASIC with 232 electrodes, custom ESD protection and active charge balancing. ISCAS 2006 - [c18]Maurits Ortmanns, N. Unger, André Rocke, Marcus Gehrke, H. J. Tietdke:
A 0.1mm2, Digitally Programmable Nerve Stimulation Pad Cell with High-Voltage Capability for a Retinal Implant. ISSCC 2006: 89-98 - 2005
- [j4]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
A continuous-time ΣΔ Modulator with reduced sensitivity to clock jitter through SCR feedback. IEEE Trans. Circuits Syst. I Regul. Pap. 52-I(5): 875-884 (2005) - [j3]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
A Case Study on a 2-1-1 Cascaded Continuous-Time Sigma-Delta Modulator. IEEE Trans. Circuits Syst. I Regul. Pap. 52-I(8): 1515-1525 (2005) - [c17]Friedel Gerfers, Maurits Ortmanns, Yiannos Manoli:
A new technique for automatic error correction in Sigma-Delta modulators. ISCAS (3) 2005: 2539-2542 - [c16]Friedel Gerfers, Maurits Ortmanns, Yiannos Manoli:
Increased jitter sensitivity in continuous- and discrete-time Sigma-Delta modulators due to finite opamp settling speed. ISCAS (3) 2005: 2543-2546 - 2004
- [j2]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
Compensation of finite gain-bandwidth induced errors in continuous-time sigma-delta modulators. IEEE Trans. Circuits Syst. I Regul. Pap. 51-I(6): 1088-1099 (2004) - [c15]Maurits Ortmanns, Markus Kuderer, Yiannos Manoli, Friedel Gerfers:
A cascaded continuous-time Sigma Delta modulator with 80 dB dynamic range. ISCAS (1) 2004: 405-408 - [c14]Friedel Gerfers, Maurits Ortmanns, Yiannos Manoli:
Design issues and performance limitations of a clock jitter insensitive multibit DAC architecture for high-performance low-power CT Sigma Delta modulators. ISCAS (1) 2004: 1076-1079 - 2003
- [j1]Friedel Gerfers, Maurits Ortmanns, Yiannos Manoli:
A 1.5-V 12-bit power-efficient continuous-time third-order ΣΔ modulator. IEEE J. Solid State Circuits 38(8): 1343-1352 (2003) - [c13]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
A continuous-time sigma-delta modulator with switched capacitor controlled current mode feedback. ESSCIRC 2003: 249-252 - [c12]Markus Becker, Knut Heiber, Maurits Ortmanns, Yiannos Manoli:
A power optimized decimator architecture for cascaded sigma-delta analog-to-digital converters. ICECS 2003: 798-801 - [c11]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
Compensation of the influence of finite gain-bandwidth on continuous-time sigma-delta modulators. ICECS 2003: 950-953 - [c10]Friedel Gerfers, Maurits Ortmanns, P. Schmitz, Yiannos Manoli, Kian Min Soh:
A clock jitter insensitive multibit DAC architecture for high-performance low-power continuous-time ΣΔ modulators. ICECS 2003: 958-961 - [c9]Friedel Gerfers, Maurits Ortmanns, Yiannos Manoli:
A 1 V, 12-bit wideband continuous-time ΣΔ modulator for UMTS applications. ISCAS (1) 2003: 921-924 - [c8]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
Influence of finite integrator gain bandwidth on continuous-time sigma delta modulators. ISCAS (1) 2003: 925-928 - [c7]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
Fundamental limits of jitter insensitivity in discrete and continuous-time sigma delta modulators. ISCAS (1) 2003: 1037-1040 - 2002
- [c6]Maurits Ortmanns, Lourans Samid, Yiannos Manoli, Friedel Gerfers:
Multirate cascaded continuous time Sigma-Delta modulators. ISCAS (4) 2002: 225-228 - [c5]Friedel Gerfers, Kian Min Soh, Maurits Ortmanns, Yiannos Manoli:
Figure of merit based design strategy for low-power continuous-time Sigma-Delta modulators. ISCAS (4) 2002: 233-236 - [c4]Lourans Samid, Maurits Ortmanns, Yiannos Manoli, Friedel Gerfers:
A new kind of low-power multibit third order continuous-time lowpass Sigma-Delta modulator. ISCAS (3) 2002: 293-296 - 2001
- [c3]Maurits Ortmanns, Friedel Gerfers, Lourans Samid, Yiannos Manoli:
Successful design of cascaded continuous-time ΣΔ modulators. ICECS 2001: 321-324 - [c2]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
Clock jitter insensitive continuous-time ΣΔ modulators. ICECS 2001: 1049-1052 - [c1]Maurits Ortmanns, Friedel Gerfers, Yiannos Manoli:
On the synthesis of cascaded continuous-time Sigma-Delta modulators. ISCAS (5) 2001: 419-422
Coauthor Index
[j48] [c171] [j30] [j29] [c160] [c159] [c157] [c151] [c149] [j26] [c144] [c142] [c141] [c138] [c136] [c135] [c134] [c133] [c132] [c129] [c128] [c127] [c125] [c124] [c121] [c120] [c118] [c117] [j22] [c113] [c112] [c111] [j20] [j19] [c110] [c109] [c108] [c106] [c105] [c104] [c103] [c102] [c101] [c98] [c97] [c96] [c95] [c94] [c92] [c90] [c89] [c88] [c87] [c86] [c83] [c80] [c35]
[c227] [c209] [j50] [c205] [c203] [c202] [j46] [j45] [j41] [c193] [c187] [j35] [c180] [c179] [c178] [c172] [c168] [j30] [j28] [c155] [c154] [c151] [c143] [c139] [c130] [j25] [j24] [c128] [c127] [c122] [c113] [j21] [j19] [j18] [c110] [c109] [c108] [c97] [c86] [c84] [c80] [c79] [j15] [j14] [c72] [c70] [c65] [c64] [c58] [c54] [j13] [j12] [c48] [c47] [c46] [c40] [j8] [c32] [c30] [c24]
Paul Kässer
aka: Paul Kaesser
aka: Paul Kaesser
Jonathan Ungethüm
aka: Jonathan Ungethuem
aka: Jonathan Ungethuem
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