基于伪差分结构的1.5 V CMOS VGA

2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353) Pub Date : 2000-05-28 DOI:10.1109/ISCAS.2000.858788

Michael M. Green, S. R. Joshi

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引用次数: 34

摘要

描述了一种工作电压低至V/sub DD/=1.5 V的CMOS变增益放大器。增益特性被安排为一个接近指数函数的控制电压由一个新的电路拓扑，利用三极管偏置晶体管在伪差分配置。该电路采用0.35 /spl mu/m CMOS工艺设计，工作频率为3db，频率为21 MHz，最大功耗为24.8 mW。

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A 1.5 V CMOS VGA based on pseudo-differential structures

A CMOS variable-gain amplifier that works down to V/sub DD/=1.5 V is described. The gain characteristic is arranged to be a nearly exponential function of control voltage by a novel circuit topology that utilizes triode-biased transistors in pseudo-differential configurations. This circuit is designed using a 0.35 /spl mu/m CMOS process and operates at a 3-dB frequency of 21 MHz with a maximum power consumption of 24.8 mW.

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2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353)

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