Patent ID: 8369714

Claim:
A burst optical signal receiving device, comprising: a photodetector; a trans-impedance amplifier, having an enabling input end of a direct current (DC) cancellation function and a DC bias input end; a group of alternating current (AC) coupling capacitors; and a limiting amplifier having an enabling input end of a DC cancellation function; wherein an output end of the photodetector is connected with an input end of the trans-impedance amplifier; the enabling input end of the DC cancellation function of the trans-impedance amplifier is connected to a first DC cancellation forbidding circuit to disable the DC cancellation function of the trans-impedance amplifier; the DC bias input end of the trans-impedance amplifier is grounded through a resistor; one end of each of the group of AC coupling capacitors is directly connected with an output end of the trans-impedance amplifier respectively; the other end of the AC coupling capacitor is connected with an input end of the limiting amplifier respectively; the enabling input end of the DC cancellation function of the limiting amplifier is connected to a second DC cancellation forbidding circuit to disable the DC cancellation function of the limiting amplifier and an output end of the limiting amplifier outputs a burst differential voltage signal.