Design of transimpedance amplifier for optical receivers in 0.13 µm CMOS

We report the implementation of a transimpedance amplifier (TIA), using the combination of the shunt-feedback topology with the regulated-cascode input stage and broadband matching network, in a 0.13 µm CMOS technology. The proposed TIA achieves a 3-dB bandwidth of 7.5 GHz, transimpedance gain of 50 dBΩ in the presence of 300 fF photodiode capacitance, a gain-bandwidth product per DC power figure of merit of 578 GHzΩ/mW.