DC removal in an optical receiver

摘要

A burst-mode optical receiver includes a trans impedance amplifier, a bottom level detector, an automatic gain controller, a top level detector, a pair of resistors for generating a signal reference voltage from the bottom and top level voltages, and a differential buffer for receiving outputs from the trans-impedance amplifier and the signal reference voltage from the pair of resistors and for eliminating the offsets generated from the bottom and top level detectors in order to supply two differential outputs.