A Common-Source Input Stage-Based Transimpedance Amplifier for Fiber Optical Systems

A simulated transimpedance amplifier (TIA) is proposed in this work with analytical derivations. The common source (CS) input stage proved to show extremely low power consumption and input-referred noise current (spectral density) with high TIA gain and moderate f_(-3dB) bandwidth. A value of 56.8 dBΩ in TIA gain magnitude is reported at a bandwidth (BW) of 1 GHz. A low 0.41 mW of total power consumption was achieved, corresponding to the 15.3 pA⁄√(H_z) well reduced magnitude. A specific trade-off relaxation property appears to have occurred between TIA gain and input referred noise current on one hand, while on the other hand, a combinational low power consumption and input referred noise current took place. The above key findings represent the valuable solutions for the main challenges in industrial applications, especially in reducing TIA power consumption, as application-specific, demand with high integrity signals involving low input referred noise current .