10 Gb/s 1.95 mW active cascode transimpedance amplifier for high speed optical receivers

This paper presents the design and performance of a transimpedance amplifier (TIA) for optical receivers integrated in a 130nm CMOS technology. The proposed TIA is based on common source (CS) voltage amplifier with a shunt-shunt feedback resistor using active cascode technique (CSAC-TIA). The CSAC technique succeeds to extend the bandwidth without scarifying the gain and power consumption. The presented CSAC-TIA shows a post layout simulated transimpedance gain of 56.65 dBΩ with bandwidth 7 GHz for 0.2 pF photodiode capacitance and optical sensitivity of -20.5 dBm at a BER= 10
^-12
. The presented CSAC-TIA consumes 1.95 mW from single voltage supply of 1.5 V.