Patent ID: 6396614
Filing Date: 2002-05-28
Classification: H04B

Abstract:
An optical signal receiving circuit, comprising:a photodiode for converting and input optical signal into a current signal, a current feed back amplifier for converting said current signal supplied from an anode of said photodiode into a voltage signal, wherein input and output terminals of said current feed back amplifier are connected by a first resistor, a second resistor inserted between a cathode of said photodiode and a terminal of a power supply for a reverse bias voltage, wherein said reverse bias voltage of said cathode of said photodiode is supplied through said second resistor, a peak-detecting circuit for detecting an amplitude of a receiving signal voltage generated by said current signal between both ends of said second resistor, and an adjusting circuit for controlling a feed back current of said current feed back amplifier based on an output voltage of said peak-detecting circuit.