A newrail-to-rail opamp with bulk-driven input stage and interleaved class-AB ouput stage

Author

Ma Jianping ; Yuan Chen ; Tian Tong

Author_Institution

Key Lab. of Wireless Sensor Network & Commun., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China

fYear

2014

fDate

28-31 Oct. 2014

Firstpage

1

Lastpage

3

Abstract

This paper introduces a fully differential rail-to-rail input/output CMOS operational amplifier consisting of a bulk-driven input stage and an interleaved class-AB output stage. The input stage features a partial positive feedback loop to improve the gain and gain-bandwidth-product. Post-layout simulated results have shown that the proposed opamp, implemented in standard 65nm CMOS technology and with a 1.2V supply, obtains an open-loop DC gain higher than 72dB and gain-bandwidth-product above 15MHz when a 6pF load is connected to the differential output.

Keywords

CMOS analogue integrated circuits; operational amplifiers; bulk-driven input stage; capacitance 6 pF; differential rail-to-rail input-output CMOS operational amplifier; gain-bandwidth-product; interleaved class-AB ouput stage; opamp; open-loop DC gain; partial positive feedback loop; post-layout simulation; size 65 nm; standard CMOS technology; voltage 1.2 V; Abstracts; CMOS integrated circuits; CMOS technology; Logic gates;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on

Conference_Location

Guilin

Print_ISBN

978-1-4799-3296-2

Type

conf

DOI

10.1109/ICSICT.2014.7021588

Filename

7021588