Abstract text

There is provided an optical receiver-amplifier wherein the need for a large capacitance capacitor for AC coupling is eliminated to thereby enable miniaturization of a receiver in whole, and output waveforms of a differential limiter amp can be rendered symmetrical with high precision while a transimpedance amp and a limiter amp can be integrated on one chip. The optical receiver-amplifier comprises a photodiode, a transimpedance amp for amplifying an output signal of the photodiode, and a DC current compensating circuit connected in parallel with the transimpedance amp for compensating for a DC-current component of an output current of the differential amp.