全差分放大器用次阈值操作反馈电路抵消偏置

2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009) Pub Date : 2009-12-01 DOI:10.1109/ICECS.2009.5410959

T. Iida, T. Asai, E. Sano, Y. Amemiya

{"title":"全差分放大器用次阈值操作反馈电路抵消偏置","authors":"T. Iida, T. Asai, E. Sano, Y. Amemiya","doi":"10.1109/ICECS.2009.5410959","DOIUrl":null,"url":null,"abstract":"An offset cancellation technique for fully differential amplifiers is proposed. This technique uses subthreshold-operated operational amplifiers (subth-OP amps) for feedback biasing. Two subth-OP amps sense the two outputs of the differential amplifier and accordingly adjust the load currents in the amplifier to fix the outputs to a given reference voltage. The feedback operation is established only at dc and low frequencies because the subth-OP amps operate very slowly. The differential amplifier consequently operates as a high-pass filter and therefore shows no dc offset in its output, while it can normally amplify ac input signals. The results for the simulation and fabrication of the device are described.","PeriodicalId":343974,"journal":{"name":"2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":"{\"title\":\"Offset cancellation with subthreshold-operated feedback circuit for fully differential amplifiers\",\"authors\":\"T. Iida, T. Asai, E. Sano, Y. Amemiya\",\"doi\":\"10.1109/ICECS.2009.5410959\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An offset cancellation technique for fully differential amplifiers is proposed. This technique uses subthreshold-operated operational amplifiers (subth-OP amps) for feedback biasing. Two subth-OP amps sense the two outputs of the differential amplifier and accordingly adjust the load currents in the amplifier to fix the outputs to a given reference voltage. The feedback operation is established only at dc and low frequencies because the subth-OP amps operate very slowly. The differential amplifier consequently operates as a high-pass filter and therefore shows no dc offset in its output, while it can normally amplify ac input signals. The results for the simulation and fabrication of the device are described.\",\"PeriodicalId\":343974,\"journal\":{\"name\":\"2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009)\",\"volume\":\"62 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICECS.2009.5410959\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICECS.2009.5410959","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 11

摘要

提出了一种用于全差分放大器的偏置抵消技术。该技术使用亚阈值运算放大器(subth-OP放大器)进行反馈偏置。两个次运算放大器检测差分放大器的两个输出，并相应地调整放大器中的负载电流，将输出固定到给定的参考电压。反馈操作仅在直流和低频下建立，因为次运算放大器工作非常缓慢。差分放大器因此作为高通滤波器工作，因此在其输出中没有直流偏置，而它通常可以放大交流输入信号。介绍了该装置的仿真和制作结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Offset cancellation with subthreshold-operated feedback circuit for fully differential amplifiers

An offset cancellation technique for fully differential amplifiers is proposed. This technique uses subthreshold-operated operational amplifiers (subth-OP amps) for feedback biasing. Two subth-OP amps sense the two outputs of the differential amplifier and accordingly adjust the load currents in the amplifier to fix the outputs to a given reference voltage. The feedback operation is established only at dc and low frequencies because the subth-OP amps operate very slowly. The differential amplifier consequently operates as a high-pass filter and therefore shows no dc offset in its output, while it can normally amplify ac input signals. The results for the simulation and fabrication of the device are described.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

2009 16th IEEE International Conference on Electronics, Circuits and Systems - (ICECS 2009)

自引率

0.00%

发文量