A CMOS optical preamplifier for wireless infrared communications

Author

Phang, Khoman ; Johns, David A.

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada

Volume

46

Issue

7

fYear

1999

fDate

7/1/1999 12:00:00 AM

Firstpage

852

Lastpage

859

Abstract

This paper describes a CMOS optical preamplifier suitable for infrared wireless data communications. The preamplifier consists of a differential CMOS variable-gain transimpedance amplifier embedded in a larger feedback loop used to reject photocurrents generated by ambient light. Fabricated in a commercial 0.35-μm CMOS process, the preamplifier consumes 8 mW at 3 V, and provides 70 MHz bandwidth over a 77-dB dynamic range with a maximum transimpedance gain of 19 kΩ. The bandwidth is controlled within a factor of two over a 31-dB variation in gain

Keywords

CMOS analogue integrated circuits; data communication; differential amplifiers; feedback amplifiers; integrated optoelectronics; optical communication equipment; preamplifiers; 0.35 micron; 3 V; 70 MHz; 8 mW; CMOS optical preamplifier; ambient photocurrent rejection circuit; differential variable-gain transimpedance amplifier; feedback loop; infrared wireless data communication; Bandwidth; Data communication; Differential amplifiers; Feedback loop; Optical amplifiers; Optical feedback; Optical fiber communication; Preamplifiers; Stimulated emission; Wireless communication;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.775380

Filename

775380