Title :
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
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;
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
DOI :
10.1109/EDSSC.2007.4450262
