A novel low power consumption and quasilinear CMOS optically coupled isolation amplifier

Author

Cheng, Li ; Yang, Ning ; Zhou, Xiaodi ; Yan, Ming

Author_Institution

Sch. of Electr. & Inf., Jiangsu Univ., Zhenjiang, China

Volume

5

fYear

2010

fDate

24-26 Aug. 2010

Firstpage

175

Lastpage

178

Abstract

A kind of novel CMOS optically coupled isolation amplifier (OCIA) composed of two operational amplifiers (OAs) is present. To improve the linearity and reduce the power consumption, the negative feedback signal is introduced to the input loop through two photoelectric coupled devices. Besides, other improvement actions are taken in this amplifier. Experimental results show that compared with the BiCMOS OCIA, the ±3 dB bandwidth of this amplifier increases about 14 kHz, the power consumption (PD) reduces 5.46 mW, and the gain linearity increases to 5.9×10^-5. Its delay-power product is about 25.7 nJ, far lower than that of BiCMOS. So this amplifier is very suitable for high-linearity, low power consumption photoelectric signal processing and intelligent detecting systems.

Keywords

CMOS analogue integrated circuits; low-power electronics; operational amplifiers; photoelectric devices; delay-power product; gain linearity; low power consumption; negative feedback signal; operational amplifiers; photoelectric coupled devices; quasilinear CMOS optically coupled isolation amplifier; Bandwidth; BiCMOS integrated circuits; CMOS integrated circuits; Delay; Integrated optics; Logic gates; Stimulated emission; CMOS devices; linearity; low power consumption; optically coupled isolation amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer, Mechatronics, Control and Electronic Engineering (CMCE), 2010 International Conference on

Conference_Location

Changchun

Print_ISBN

978-1-4244-7957-3

Type

conf

DOI

10.1109/CMCE.2010.5610001

Filename

5610001