Title :
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
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;
Conference_Titel :
Anti-Counterfeiting Security and Identification in Communication (ASID), 2010 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-6731-0
DOI :
10.1109/ICASID.2010.5551828
