High CMRR low-voltage low power current output stage with a novel CMFB

Author

Azhari, Seyed Javad ; Ghorbani, Alireza ; Safari, Leila

Author_Institution

Dept. of Electron., Univ. of Sci. & Technol., Tehran, Iran

Volume

3

fYear

2011

fDate

11-13 March 2011

Firstpage

382

Lastpage

386

Abstract

In this paper, a low voltage low power (LPLV) current output stage (COS) with high CMRR is proposed. A novel common mode feedback (CMFB) technique is exploited to provide high CMRR. That is done by summing the main common mode signal and its opposite polarity one which provides over 112 dB of CMRR in 0.18 μm CMOS technology of TSMC. The circuit operates with very low supply voltages of ±0.5 V and consumes only 145 μW power which show good improvement compared to other similar stages in literatures. Monte Carlo simulation of CMRR is also performed and shows its sufficient robustness against mismatches.

Keywords

CMOS analogue integrated circuits; Monte Carlo methods; circuit feedback; low-power electronics; operational amplifiers; CMFB technique; Monte Carlo simulation; common mode feedback technique; common mode signal; current operational amplifiers; high CMRR low-voltage low power current output stage; power 145 muW; size 0.18 mum; voltage -0.5 V; voltage 0.5 V; CMOS integrated circuits; Inverters; Low voltage; Operational amplifiers; Simulation; Transistors; CMFB; CMRR; COS; Current Oprational Amplifier COA; Current mode;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Research and Development (ICCRD), 2011 3rd International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-61284-839-6

Type

conf

DOI

10.1109/ICCRD.2011.5764219

Filename

5764219