A new transimpedance preamplifier topology for high-frequency applications

A fully new CMOS transimpedance preamplifier topology for fiber optics receivers is presented. It is based on the common-gate topology, with negative feedback to increase the bandwidth of the circuit. A bandwidth of 2.7 GHz, with important noise reduction, was achieved. Intermodulation products of 42 dB below the carrier were obtained. Simulations were performed using BSIM3v3 models for HSPICE and Spectre-CADENCE software.