Programmable SiGe BiCMOS low-pass filter for a multicarrier WCDMA base-station receiver
SiGe BiCMOS low-pass filter for a multicarrier WCDMA base-station receiver is described in this paper. The 4th-order Chebyshev filter with a 0.1-dB passband ripple is designed to drive a high-resolution A/D converter. The 3-dB frequency of the ...
One GHz class E RF power amplifier for a polar transmitter
This paper describes advantages and characteristics of a class E power amplifier when used in a polar transmitter system. Basic principles of class E operation and information about different nonlinearities are given. Also, modifying the transistor ...
A low-power phase-locked loop for UWB applications
This paper describes a low-power phase-locked loop (PLL) design for WiMedia UWB synthesizer implemented in a 0.13-μm CMOS process. Three parallel PLLs and a multiplexer (MUX) constitute a frequency synthesizer which is used to generate carrier ...
Low-noise amplifiers for WCDMA base-station receivers
This paper focuses on the design and measurements of low-noise amplifiers (LNA) targeted for WCDMA base-station applications. In addition, various gain control techniques and the accuracy in noise measurements have been analyzed. Two different LNA ...
Design of a linearly assisted switcher for a supply modulated RF transmitter
A broadband modulated power supply for envelope tracking or polar RF transmitters has been built. To study the design constraints, an efficient state-based simulation tool was developed. Based on the simulations, a prototype supply was built. It can ...
Switched capacitor analog modulo integrator for application in open loop Sigma-Delta modulators
We introduce the switched capacitor analog modulo integrator, which to our knowledge is a new circuit. We introduce the amplitude modulated open loop ΣΔ modulator (OLSDM), which is an analog modulo integrator followed by a quantizer and a modulo ...
Large and small signal distortion analysis using modified Volterra series
A new approach to the Volterra analysis of analog circuits is presented. Volterra analysis is widely used for the calculation of harmonic and intermodulation distortion products. However, the analysis is limited to circuits experiencing small signal ...
