Page 1. New Compact Implementation of a very High Performance CMOS Current Mirror Milind Subhash ... more Page 1. New Compact Implementation of a very High Performance CMOS Current Mirror Milind Subhash Sawant1, Jaime Ramírez-Angulo1, Antonio. J. López-Martín2 andRamon G. Carvajal3 1 Klipsch School of Electrical and ...
This work proposes the Integral Homotopy Expansive Method (IHEM) in order to find both analytical... more This work proposes the Integral Homotopy Expansive Method (IHEM) in order to find both analytical approximate and exact solutions for linear and nonlinear differential equations. The proposal consists of providing a versatile method able to provide analytical expressions that adequately describe the scientific phenomena considered. In this analysis, it is observed that the proposed solutions are compact and easy to evaluate, which is ideal for practical applications. The method expresses a differential equation as an integral equation and expresses the integrand of the equation in terms of a homotopy. As a matter of fact, IHEM will take advantage of the homotopy flexibility in order to introduce adjusting parameters and convenient functions with the purpose of acquiring better results. In a sequence, another advantage of IHEM is the chance to distribute one or more of the initial conditions in the different iterations of the proposed method. This scheme is employed in order to intro...
In this paper, we present the design of an analog Automatic Gain Control with a small silicon are... more In this paper, we present the design of an analog Automatic Gain Control with a small silicon area and reduced power consumption using a 0.5 μ m process. The design uses a classical approach implementing the AGC system with simple blocks, such as: peak detector, difference amplifier, four-quadrant multiplier, and inversor amplifier. Those blocks were realized by using a modified Miller type OPAMP, which allows indirect compensation, while the peak detector uses a MOS diode. The AGC design is simulated using the Tanner-Eda environment and Berkeley models BSIM49 of the On-Semiconductor C5 process, and it was fabricated through the MOSIS prototyping service. The AGC system has an operation frequency of around 1 kHz, covering the range of biomedical applications, power consumption of 200 μ W, and the design occupies a silicon area of approximately 508.8 μ m × 317.7 μ m. According to the characteristics obtained at the experimental level (attack and release time), this AGC can be applied...
A very low distortion low-voltage BiCMOS OTA with very wide gm adjustment and input range is pres... more A very low distortion low-voltage BiCMOS OTA with very wide gm adjustment and input range is presented. It is based on a highly linear voltage-to- current converter input stage and it uses linear electronically programmable current mirrors to achieve wide transconductance gain adjustment range It can be implemented in BICMOS technology or standard CMOS technology with lateral bipolar transistors or
A continuous-time analog median filter implementation is presented. The filter uses two new circu... more A continuous-time analog median filter implementation is presented. The filter uses two new circuits to implement the delay line and median blocks. Both circuits were designed in a compact and modular structure to allow implementation of array processors. The circuit was designed for a 2pm technology MOSIS process.
Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03., 2003
A simple scheme to boost the supply voltage above and below the supply rails is introduced. Three... more A simple scheme to boost the supply voltage above and below the supply rails is introduced. Three applications of this technique are discussed: a) a rail-to-rail sample and hold circuit operating from a single supply voltage close to a transistor's threshold voltage; b) a low-voltage rail-to-rail switch for high precision applications; c) a NAND gate capable of operating with a
42nd Midwest Symposium on Circuits and Systems (Cat. No.99CH36356), 2000
... Also, if the transconductor is going to be used in the design of GM-C filters, a high input r... more ... Also, if the transconductor is going to be used in the design of GM-C filters, a high input resistance (Ri,,) is needed to obtain reasonable values for the ... b~. For a CMOS technology with VT,~ x I+p x O.S5V, is possible to design a t,ransconductor with P& = 1.51-and P.bios = 0.22V ...
2006 IEEE Biomedical Circuits and Systems Conference, 2006
E. López-Morillo, RG Carvajal, J. Galan Escuela Superior de Ingenieros University of Seville, cam... more E. López-Morillo, RG Carvajal, J. Galan Escuela Superior de Ingenieros University of Seville, camino de los descubrimeintos s/n 41092 Sevilla, Spain carvajal@gte.esi.us.es ... Jaime Ramirez-Angulo Klipsch School of Electrical and Computer Engineering New Mexico ...
The paper presents a simple analog circuit which can realize the membership functions necessary f... more The paper presents a simple analog circuit which can realize the membership functions necessary for a hardware implementation of fuzzy reasoning. The circuit, which is based on bipolar technology, arranges these transistors in such a way so as to produce a current spike similar to that observed in the CMOS inverter configuration during switching. The spike characteristic is then amplified
Page 1. New Compact Implementation of a very High Performance CMOS Current Mirror Milind Subhash ... more Page 1. New Compact Implementation of a very High Performance CMOS Current Mirror Milind Subhash Sawant1, Jaime Ramírez-Angulo1, Antonio. J. López-Martín2 andRamon G. Carvajal3 1 Klipsch School of Electrical and ...
This work proposes the Integral Homotopy Expansive Method (IHEM) in order to find both analytical... more This work proposes the Integral Homotopy Expansive Method (IHEM) in order to find both analytical approximate and exact solutions for linear and nonlinear differential equations. The proposal consists of providing a versatile method able to provide analytical expressions that adequately describe the scientific phenomena considered. In this analysis, it is observed that the proposed solutions are compact and easy to evaluate, which is ideal for practical applications. The method expresses a differential equation as an integral equation and expresses the integrand of the equation in terms of a homotopy. As a matter of fact, IHEM will take advantage of the homotopy flexibility in order to introduce adjusting parameters and convenient functions with the purpose of acquiring better results. In a sequence, another advantage of IHEM is the chance to distribute one or more of the initial conditions in the different iterations of the proposed method. This scheme is employed in order to intro...
In this paper, we present the design of an analog Automatic Gain Control with a small silicon are... more In this paper, we present the design of an analog Automatic Gain Control with a small silicon area and reduced power consumption using a 0.5 μ m process. The design uses a classical approach implementing the AGC system with simple blocks, such as: peak detector, difference amplifier, four-quadrant multiplier, and inversor amplifier. Those blocks were realized by using a modified Miller type OPAMP, which allows indirect compensation, while the peak detector uses a MOS diode. The AGC design is simulated using the Tanner-Eda environment and Berkeley models BSIM49 of the On-Semiconductor C5 process, and it was fabricated through the MOSIS prototyping service. The AGC system has an operation frequency of around 1 kHz, covering the range of biomedical applications, power consumption of 200 μ W, and the design occupies a silicon area of approximately 508.8 μ m × 317.7 μ m. According to the characteristics obtained at the experimental level (attack and release time), this AGC can be applied...
A very low distortion low-voltage BiCMOS OTA with very wide gm adjustment and input range is pres... more A very low distortion low-voltage BiCMOS OTA with very wide gm adjustment and input range is presented. It is based on a highly linear voltage-to- current converter input stage and it uses linear electronically programmable current mirrors to achieve wide transconductance gain adjustment range It can be implemented in BICMOS technology or standard CMOS technology with lateral bipolar transistors or
A continuous-time analog median filter implementation is presented. The filter uses two new circu... more A continuous-time analog median filter implementation is presented. The filter uses two new circuits to implement the delay line and median blocks. Both circuits were designed in a compact and modular structure to allow implementation of array processors. The circuit was designed for a 2pm technology MOSIS process.
Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03., 2003
A simple scheme to boost the supply voltage above and below the supply rails is introduced. Three... more A simple scheme to boost the supply voltage above and below the supply rails is introduced. Three applications of this technique are discussed: a) a rail-to-rail sample and hold circuit operating from a single supply voltage close to a transistor's threshold voltage; b) a low-voltage rail-to-rail switch for high precision applications; c) a NAND gate capable of operating with a
42nd Midwest Symposium on Circuits and Systems (Cat. No.99CH36356), 2000
... Also, if the transconductor is going to be used in the design of GM-C filters, a high input r... more ... Also, if the transconductor is going to be used in the design of GM-C filters, a high input resistance (Ri,,) is needed to obtain reasonable values for the ... b~. For a CMOS technology with VT,~ x I+p x O.S5V, is possible to design a t,ransconductor with P& = 1.51-and P.bios = 0.22V ...
2006 IEEE Biomedical Circuits and Systems Conference, 2006
E. López-Morillo, RG Carvajal, J. Galan Escuela Superior de Ingenieros University of Seville, cam... more E. López-Morillo, RG Carvajal, J. Galan Escuela Superior de Ingenieros University of Seville, camino de los descubrimeintos s/n 41092 Sevilla, Spain carvajal@gte.esi.us.es ... Jaime Ramirez-Angulo Klipsch School of Electrical and Computer Engineering New Mexico ...
The paper presents a simple analog circuit which can realize the membership functions necessary f... more The paper presents a simple analog circuit which can realize the membership functions necessary for a hardware implementation of fuzzy reasoning. The circuit, which is based on bipolar technology, arranges these transistors in such a way so as to produce a current spike similar to that observed in the CMOS inverter configuration during switching. The spike characteristic is then amplified
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Papers by Jaime Ramirez-angulo