A Low-Power Low-Distortion Differential Class AB Amplifier with Double Nested Miller Compensation Structure

Author

Menglian, Zhao ; Xiaobo, Wu ; Li, Deng ; Xiaolang, Yan

Author_Institution

Zhejiang Univ., Hangzhou

fYear

2007

fDate

20-22 Dec. 2007

Firstpage

863

Lastpage

865

Abstract

A four-stage BiCMOS operational amplifier with a quiescent current-controlled class AB output stage was presented. Double nested Miller compensation was taken to improve the stability. Either single or double power supplies were available for the amplifier and the voltage could be as low as 2 V. The quiescent output current under 5 V supply voltage was about 8 muA. With a load of 60 pF and 25 kOmega, the open loop DC gain achieved 125 dB and the phase margin was 77deg.

Keywords

BiCMOS analogue integrated circuits; differential amplifiers; low-power electronics; operational amplifiers; BiCMOS operational amplifier; class AB amplifier; differential amplifier; double nested Miller compensation structure; gain 125 dB; low-distortion amplifier; low-power amplifier; phase margin; quiescent current-controlled amplifier; voltage 2 V; CMOS technology; Capacitors; Current supplies; Differential amplifiers; Frequency; Low voltage; Operational amplifiers; Stability; Switches; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices and Solid-State Circuits, 2007. EDSSC 2007. IEEE Conference on

Conference_Location

Tainan

Print_ISBN

978-1-4244-0637-1

Electronic_ISBN

978-1-4244-0637-1

Type

conf

DOI

10.1109/EDSSC.2007.4450262

Filename

4450262