An offset cancellation technique for two-stage CMOS operational amplifiers

被引：0
|
作者：
Lu, Chih-Wen [1 ]
机构：
[1] Natl Chi Nan Univ, Dept Elect Engn, Nantou, Taiwan
来源：
2007 IEEE INTERNATIONAL CONFERENCE ON INTEGRATED CIRCUIT DESIGN AND TECHNOLOGY, PROCEEDINGS | 2007年
关键词：
offset; offset voltage; offset cancellation; operational amplifier; op-amp;
D O I：
10.1109/INOW.2007.4302928
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
An offset cancellation technique for two-stage CMOS operational amplifiers is proposed. The auxiliary amplifiers are employed to cancel the offset voltage. The error voltage is stored on a capacitor during the cancellation phase and is canceled during the normal operation. An experimental prototype amplifier implemented in a 0.35-mu m CMOS technology demonstrates that the offset voltage is reduced to 1.898 mV under a clock frequency of 200 KHz.
引用
收藏
页码：154 / +
页数：2
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