A compact output stage for low-power low-distortion amplifier with diode negative feedback

Author

Chen, Xiaoliang ; Xing, Jianli

Author_Institution

Dept. of Electron. Eng., Xiamen Univ., Xiamen, China

fYear

2010

Firstpage

97

Lastpage

100

Abstract

This paper describes a compact output stage for low-power rail to rail operational amplifier. A negative feedback diode could be used to decrease even harmonic distortion and simplify frequencies compensation. The amplifier is designed to be loaded 20pF capacitive load, and the unity-gain bandwidth is 200 KHz at 65° phase margin. The quiescent current is limit to 45uA when voltage supply is 5V. The THD down to -95dB when signal frequency at 1 KHz. Finally, this circuit has been thoroughly simulated in a standard 0.8um bipolar process.

Keywords

feedback amplifiers; harmonic distortion; low noise amplifiers; low-power electronics; operational amplifiers; power bipolar transistors; power semiconductor diodes; bipolar amplifier; capacitive load; frequency compensation; harmonic distortion; low-power low-distortion amplifier; negative feedback diode; operational amplifier; phase margin; quiescent current; unity-gain bandwidth; Capacitance; Negative feedback; Operational amplifiers; Rail to rail inputs; Rails; Resistance; Transistors; dual Class-A driven; low distortion operational; multipath component; rail to rail bipolar amplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Anti-Counterfeiting Security and Identification in Communication (ASID), 2010 International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-6731-0

Type

conf

DOI

10.1109/ICASID.2010.5551828

Filename

5551828