Burst mode optical receiver generating a reset signal for an automatic threshold control device during inter-burst periods

摘要

Disclosed herein is a burst mode optical receiver and includes a converter for converting a burst mode signal into a voltage signal (4), a bottom level detector (5) for detecting a bottom level of an output signal from the converter, an automatic gain controller (6) for automatically controlling the gain of the converter on the basis of the bottom level detected by the bottom level detector in order to maintain an amplitude of the output signal from the converter and generating a reset signal (81) when the bottom level is lower than a predetermined reference value, and a power level detector (7) for detecting a power level of the output signal from the converter and generating the reset signal and an LOS signal (8) indicative of the presence of no input signal when the detected power level is lower than a predetermined reference value. The reset signal is used for initializing an automatic threshold control circuit (102) during inter-burst periods. <IMAGE>