Patent ID: 7098716
Filing Date: 2006-08-29
Classification: H03F,H03K,H04B

Abstract:
1. A photo-electric pulse conversion circuit that converts an optical pulse signal to a corresponding electrical pulse signal, comprising: a light-current conversion circuit that converts the optical pulse signal to a corresponding current signal and outputs the current signal; either a high-pass I–V conversion circuit that converts the current signal to a pair of corresponding differential voltage signals and outputs the differential voltage signals through a capacitive coupling capacitor, or a differentiating I–V conversion circuit that converts the current signal to a pair of differential voltage signals with a waveform similar to that of signals which are obtained by differentiation of the current signal; a differential amplification circuit with a DC offset cancellation circuit that amplifies the differential voltage signals as a pair of differential input signals and outputs a pair of differential output signals; and a pulse generation circuit that outputs the electrical pulse signal based on the differential output signals; wherein the differential amplification circuit with the DC offset cancellation circuit comprises: