A CMOS infrared optical preamplifier with a variable-gain transimpedance amplifier

Author

Chen, Roger Yubtzuan ; Hung, Chih-Yuan ; Hung, Tsung-Shuen

Author_Institution

Dept. of Electron. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan

Volume

1

fYear

2004

fDate

6-9 Dec. 2004

Firstpage

265

Abstract

A CMOS infrared wireless optical receiver front-end is described. A feedback analysis is carried out for the design of a stable variable-gain transimpedance feedback amplifier. A current-mode amplifier, exhibiting a low input resistance and a high output resistance, is designed. The current amplifier is employed as the feedforward gain element of a variable-gain fully-differential transimpedance feedback amplifier. For an infrared wireless optical receiver front-end employing the transimpedance amplifier, the optical preamplifier achieves a transimpedance gain of 87dBΩ, a bandwidth of 135MHz with a 5pF photodiode capacitance, and a power consumption of 28mW.

Keywords

CMOS integrated circuits; current-mode circuits; differential amplifiers; feedback amplifiers; optical receivers; preamplifiers; 135 MHz; 28 mW; 5 pF; CMOS infrared optical preamplifier; current amplifier; current-mode amplifier; feedback amplifier; feedback analysis; feedforward gain element; fully-differential amplifier; stable variable-gain amplifier; transimpedance amplifier; transimpedance gain; wireless optical receiver front-end; Bandwidth; Feedback amplifiers; Optical amplifiers; Optical feedback; Optical receivers; Photodiodes; Power amplifiers; Preamplifiers; Semiconductor optical amplifiers; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on

Print_ISBN

0-7803-8660-4

Type

conf

DOI

10.1109/APCCAS.2004.1412745

Filename

1412745