Abstract: A novel high-bandwidth,high-sensitivity differential optical receiver without any additional cost compared to general optical receivers,is proposed for high-speed optical communications and interconnections.High bandwidth and high sensitivity are achieved through a fully differential transimpedance amplifier with balanced input loads and two photodetectors to convert the incident light into a pair of differential photogenerated currents,respectively.In addition,a corresponding 0.35μm standard CMOS optoelectronic integrated receiver with two 60μm× 30μm,1.483pF fingered p+/n-well/p-substrate photodiodes is also presented.The simulation results demonstrate that it achieves a 1.37GHz bandwidth and a 819dBΩ transimpedance gain,supporting data rates up to at least 2Gbit/s.The device consumes a core area of 0.198mm2 and the optical sensitivity is at least -13dBm for a 1E-12 bit error rate under a 2E15-1 PRBS input signal.

Key words: high-bandwidth, high-sensitivity, CMOS, optical receiver