Patent ID: 6947494
Filing Date: 2005-09-20
Classification: H04B

Abstract:
1. An apparatus for providing the bit rate control of an optical receiver comprising: a delay unit for delaying an input signal received in the optical receiver; a DC level unit for exclusively OR'ing the input signal with the delayed signal outputted from the delay unit to output a DC level signal; a converting unit for A/D converting the DC level output from the DC level unit; a clock/data reproducing unit for receiving the input signal and reproducing clocks and data based on a bit rate control signal; and, a control unit for calculating a variation in the DC level at every interrupt timing, previously set, based on the A/D converted signal, for determining whether the DC level variation occurs under the influence of temperature or due to a variation of the bit rate based on a difference between the calculated DC level variation from a predetermined variation limit, and for outputting the bit rate control signal based on the determination result.