Patent ID: 7254345
Filing Date: 2007-08-07
Classification: H04B,H04L

Abstract:
1. An optical receiver operable in response to a light signal and comprising: a clock and data recovery circuit (CDR) for recovering a sequence of clocks and a sequence of data signals in response to an intermediate data signal obtained from the light signal, with reference to a threshold control signal used for recovering the data signal sequence; a controller, responsive to the intermediate data signal and the threshold control signal, for detecting an eye pattern of the intermediate data signal that includes an eye aperture to control an eye aperture size; and a waveform equalizer, responsive to an electric signal converted from the light signal and an internal control signal, for reshaping a waveform of the electric signal into a waveform-shaped signal in accordance with the internal control signal to supply the waveform-shaped signal to the clock and data recovery circuit as the intermediate data input signal, wherein said waveform equalizer comprises: a variable gain amplifier that controls an amplitude of the delayed electric signal in response to the internal control signal from the controller; and