摘要
A 3.125-Gb/s transimpedance amplifier（TIA） for an optical communication system is realized in 0.35μm CMOS technology.The proposed TIA employs a regulated cascode configuration as the input stage, and adopts DC-cancellation techniques to stabilize the DC operating point.In addition,noise optimization is processed. The on-wafer measurement results show the transimpedance gain of 54.2 dBΩand -3 dB bandwidth of 2.31 GHz.The measured average input referred noise current spectral density is about 18.8 pA/（？）.The measured eye diagram is clear and symmetrical for 2.5-Gb/s and 3.125-Gb/s PRBS.Under a single 3.3-V supply voltage,the TIA consumes only 58.08 mW,including 20 mW from the output buffer.The whole die area is 465×435μm^2.
A 3.125-Gb/s transimpedance amplifier（TIA） for an optical communication system is realized in 0.35μm CMOS technology.The proposed TIA employs a regulated cascode configuration as the input stage, and adopts DC-cancellation techniques to stabilize the DC operating point.In addition,noise optimization is processed. The on-wafer measurement results show the transimpedance gain of 54.2 dBΩand -3 dB bandwidth of 2.31 GHz.The measured average input referred noise current spectral density is about 18.8 pA/（？）.The measured eye diagram is clear and symmetrical for 2.5-Gb/s and 3.125-Gb/s PRBS.Under a single 3.3-V supply voltage,the TIA consumes only 58.08 mW,including 20 mW from the output buffer.The whole die area is 465×435μm^2.
基金
Project supported by the National High Technology Research and Development Program of China(No.2006AA012284)
作者简介
Corresponding author. Email： xhseu@163.com
