Patent ID: 7039327
Filing Date: 2006-05-02
Classification: H04B,H04Q

Abstract:
1. An optical receiver for determining the bit rate of an optical signal, comprising: a converting unit for converting an input optical signal into an electrical signal; an amplifying unit, coupled to the converting unit, for amplifying the converted electrical signal outputted from the converting unit; a bit-rate discriminating unit for exclusively OR'ing the converted electrical signal with a delay signal delayed by a predetermined time, thereby outputting a recognition signal; a temperature sensing unit for outputting a temperature sensing signal that is indicative of an internal temperature of the optical receiver; a control unit for determining a bit rate of the converted electrical signal based on the voltage level of the converted electrical signal outputted from the bit rate discriminating unit and the temperature sensing signal; a bit-rate signal generating unit, coupled to the control unit, for generating a reference clock in response to the determined bit rate; and, a clock/data reproducing unit for receiving the converted electrical signal and for reproducing clocks and data based on the reference clock; and a signal stabilizing unit for filtering a locking signal outputted from the clock/data reproducing unit and for outputting the filtered signal to the control unit, the control unit being configured for the performing of the bit rate determining if the control unit determines, based on the filtered signal, that the clock/data reproducing unit is in a non-stabilized state; and, the control unit being configured for not performing the bit rate determining if the control unit determines, based on the filtered signal, that the clock/data reproducing unit is in a stabilized state.