A CMOS dB-linear VGA with pre-distortion compensation for wireless communication applications

Yuanjin Zheng Yuanjin Zheng,Jiangnan Yan Jiangnan Yan,Yong Xu

doi:10.1109/iscas.2004.1328319

A CMOS dB-linear VGA with pre-distortion compensation for wireless communication applications

Yuanjin Zheng Yuanjin Zheng, Jiangnan Yan Jiangnan Yan + Show 1 more

https://doi.org/10.1109/iscas.2004.1328319

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Publication Date: May 23, 2004

Citations: 15

Affiliation: Institute of Microelectronics, National University of Singapore

#Variable Gain Amplifier #dB-linear Variable Gain Amplifier + Show 8 more

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Abstract

This paper describes a CMOS dB-linear variable gain amplifier (VGA) that can provide a variable gain of 60dB while maintaining its 3dB bandwidth greater than 10 MHz. An exponential circuit is proposed to obtain the dB-linear control characteristics. The non-ideal effects on dB linearity are analyzed and the corresponding compensation methods are suggested. Simulation results based on a 0.35/spl mu/m CMOS technology are presented to demonstrate the performance of the proposed dB-linear VGA.

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