Patent ID: 9065388
Filing Date: 2015-06-23
Classification: H03F,H04B

Abstract:
1. An optical receiving circuit comprising: An optical semiconductor detector configured to receive an optical input signal and convert the optical input signal into a current signal; a differential amplifier configured to receive the converted current signal, and output a non-inverting voltage signal and an inverting voltage signal, amplitudes of the non-inverting voltage signal and the inverting voltage signal being regulated within a predetermined range; a peak detector configured to detect a peak voltage of the non-inverting voltage signal; a resistor network configured to generate a second non-inverting voltage signal and a second inverting voltage signal; a discriminator configured to discriminate a cross potential at which an oscillation of the second non-inverting voltage signal crosses an oscillation of the second inverting voltage signal, and generate a rectangular signal in accordance with the cross potential; and an adjustment circuit connected to the resistor network in parallel, the adjustment circuit configured to adjust a potential of the second non-inverting voltage signal to a potential of the second inverting voltage signal, so that a waveform of the rectangular signal is the same as a waveform of the optical input signal.