Improving the bandwidth of the transimpedance amplifier based on CS stages in cascode configuration using impedance matching techniques

摘要

This paper describes a matching technique to improve the bandwidth of multi-GHz frequency ranges for the transimpedance amplifier. It is shown that by simultaneously using of series input matching topology and T-output matching network, the bandwidth of the TIA can be obviously improved. This methodology is supported by a design example in a 0.18 mu m CMOS technology. The post layout simulation results show a -3dB bandwidth of 20 GHz with 50 fF photodiode capacitance, a transimpedance gain of , input referred noise and group delay less than . The TIA dissipates from a supply voltage.