2.5 Gbit/s compact transimpedance amplifier using active inductor in 130nm CMOS technology

This paper presents the analysis and design of a 2.5 Gbit/s transimpedance amplifier (TIA) realized in 130 nm CMOS technology. The proposed TIA uses a common source (CS) amplifier with active inductive peaking (AP-TIA). The TIA is followed by a post amplifier and an output driver to provide an interface to the measurement setup. The post layout simulation demonstrates that the TIA achieves 46.16 dBΩ transimpedance gain with 2 GHz bandwidth for 2 pF input capacitance including the photodiode, ESD, and pad capacitance. The integrated input referred noise current is 1.062 μA_rms. The complete optical receiver has 76.78 dBΩ transimpedance gain, and optical sensitivity of -21 dBm for BER= 10^-12 at data rate of 2.5 Gbit/s. The TIA alone consumes 5.4 mW whereas the total power consumption of the complete optical receiver is 47.3 mW for 1.8 V single supply voltage.