Patent ID: 7924964

Claim:
A receiver, comprising: a clock generator for generating a first clock signal; a controller for outputting a first control signal to control the clock generator to adjust a first frequency of the first clock signal, wherein the first control signal is determined by a difference between the first frequency and a second frequency of a second clock signal of a transmitter; and a processor for outputting a second control signal to control the clock generator to adjust the first frequency to be close to the second frequency when an absolute value of a current difference between the first and the second frequencies at a current time point is larger than a threshold; wherein the controller controls the clock generator when the absolute value of the current difference is smaller than the threshold; wherein the controller controls the clock generator to decrease the first frequency by an adjusting amount when a previous difference between the first and the second frequencies at a previous time point is positive and the current difference is larger than the previous difference; and wherein the controller controls the clock generator to increase the first frequency by the adjusting amount when the previous difference is negative and the current difference is smaller than the previous difference.