Patent ID: 7555218

Claim:
An optical transceiver for outputting a first optical signal by receiving a first electrical signal and outputting a second electrical signal by receiving a second optical signal, the optical transceiver comprising: an optical transmitter including, an input terminal for receiving the first electrical signal, a light-emitting device for outputting the first optical signal corresponding to the first electrical signal to an optical fiber, a delay circuit for delaying the first electrical signal, and a driver for receiving the delayed signal and for switching the light-emitting device in current mode by receiving the delayed signal; an optical receiver including, a receiving optical subassembly for receiving the second optical signal from an optical fiber, converting the second optical fiber into an electrical signal, and outputting the electrical signal, the second optical signal being different from the first optical signal, a main amplifier for receiving the electrical signal from the receiving optical subassembly, and an output terminal for outputting the second electrical signal; and a noise generator for receiving the first electrical signal to generate a compensation signal to be fed to the main amplifier of the optical receiver, wherein the compensation signal fed to the main amplifier of the optical receiver cancels a noise generated by the switching of the driver driven by the delayed signal and superposed on the electrical signal from the receiving optical subassembly.