Title :
A CMOS infrared wireless optical receiver front-end with a variable-gain fully-differential transimpedance amplifier
Author :
Chen, Roger Yubtzuan ; Hung, Tsung-Shuen ; Hung, Chih-Yuan
Author_Institution :
Dept. of Electron. Eng., Nat. Yunlin Univ., Taiwan
fDate :
5/1/2005 12:00:00 AM
Abstract :
A CMOS infrared wireless optical receiver front-end is presented. A stable variable-gain fully-differential transimpedance feedback amplifier is designed employing a current-mode amplifier as the feedforward gain element. More than a triple variation of the transimpedance gain, from 0.3 kΩ to 1 kΩ, the variable-gain transimpedance amplifier achieves desirable gain-bandwidth independence. For an infrared wireless optical receiver front-end employing the transimpedance amplifier, the optical preamplifier achieves a transimpedance gain of 66 dBΩ and a bandwidth of 114 MHz with a 5 pF photodiode capacitance, and a power consumption of 17.4 mW.
Keywords :
CMOS integrated circuits; differential amplifiers; feedback; feedforward; optical receivers; photodiodes; radio receivers; 0.3 to 1 kohm; 114 MHz; 17.4 mW; 5 pF; CMOS infrared wireless optical receiver front-end; current-mode amplifier; feedforward gain element; optical preamplifier; photodiode; variable-gain fully-differential transimpedance amplifier; Bandwidth; Feedback amplifiers; Optical amplifiers; Optical feedback; Optical receivers; Photodiodes; Power amplifiers; Preamplifiers; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2005.1467982
