Patent ID: 7755020

Claim:
A light receiving circuit comprising; a light receiving element outputting electrical current corresponding to input light; and a current-voltage converter having current-voltage conversion characteristic, the current-voltage conversion characteristic becoming smaller at a low frequency side and larger at a high frequency side, the current-voltage converter converting the current to the voltage and outputting the voltage, the current-voltage converter including an inversion amplifier and a feedback circuit, an input of the inversion amplifier being connected with the light receiving element, the feedback circuit feeding back an output of the inversion amplifier to the input of the inversion amplifier, the feedback circuit having transimpedance in frequency characteristic, the transimpedance becoming smaller at a low frequency side and larger at a high frequency side, wherein the feedback circuit includes two first resistors, a second resistor and a capacitor, the two first resistors being serially connected each other between an output terminal of the inversion amplifier and the input terminal of the inversion amplifier, the second resistor and the capacitor being serially connected between a ground line and a connection point between the two first resistors.