用于电流反馈运算放大器(CFOA)的新型低压高cmrr输入级

2009 International Conference on Advances in Computational Tools for Engineering Applications Pub Date : 2009-07-15 DOI:10.1109/ACTEA.2009.5227874

Mohammad Hekmat Kashtiban, S. J. Azhari

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引用次数: 3

摘要

本文提出了一种新型的电流反馈运算放大器(CFOA)，利用新型的共模前馈(CMFF)技术补偿输出共模信号，显著提高了其共模抑制比。采用AT&T ALA400 CBIC-R工艺的模型参数设计了整个工艺阶段，并用PSPICE进行了仿真。该CFOA的CMRR为145dB，比传统CFOA的CMRR提高了80 dB。它可以正常工作，电源低至±1.5V，适用于电流混合模式芯片(SOC)。

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Novel low-voltage high-CMRR input stage for current feedback operational amplifiers (CFOA)

In this work a novel current feedback operational amplifier (CFOA) is presented whose Common-Mode Rejection Ratio is remarkably increased exploiting a novel Common Mode Feed Forward (CMFF) technique to compensate the output common mode signal. The complete stage is designed with model parameters of AT&T's ALA400 CBIC-R process and simulated with PSPICE. The presented CFOA achieved 145dB CMRR which is 80 dB higher than CMRR of the conventional CFOA. It can properly work with power supply down to ±1.5V suitable for current mix-mode chips (SOC).

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2009 International Conference on Advances in Computational Tools for Engineering Applications

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