A Low-Power Variable-Gain Amplifier With Improved Linearity: Analysis and Design.

Zhiming Chen,Yuanjin Zheng,Foo Chung Choong,Minkyu Je

IEEE Transactions on Circuits and Systems I: Regular Papers（2012）

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摘要

A low-power variable-gain amplifier (VGA) based on transconductance (gm)-ratioed amplification is analyzed and designed with improved linearity. The VGA has the merits of continuous gain tuning, low power consumption and small chip area. However, the linearity performance of the gm-ratioed amplifier is usually poor. We analyze distortion in gm-ratioed amplifiers and propose to improve the output l...

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关键词

Gain,Linearity,Noise,Transistors,Transconductance,Bandwidth,Taylor series

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