Patent ID: 8605772

Claim:
A transceiver system coupled to a host unit, the transceiver system comprising: a clock/data recovery type receiver, receiving an external signal from the host unit and extracting the external signal for generating a clock signal and a data signal; a dividing unit coupled to the clock/data recovery type receiver, performing frequency division of the clock signal for generating a reference clock; a transmitter coupled to the dividing unit, transmitting output data content to the host unit based on the reference clock; a comparing unit, sampling the external signal based on a sampling frequency for generating the data signal and a sampling signal; a phase detector coupled to the comparing unit, detecting a phase variation between a first voltage-controlled oscillation signal and the sampling signal for generating a first phase difference signal, and detecting a phase variation between a second voltage-controlled oscillation signal and the sampling signal for generating a second phase difference signal; a frequency detector coupled to the phase detector, detecting a frequency of the first phase difference signal for generating a first frequency difference signal, and detecting a frequency of the second phase difference signal for generating a second frequency difference signal; a voltage-controlled oscillator, generating the first voltage-controlled oscillation signal and generating the second voltage-controlled oscillation signal when the frequency detector adjusts the frequency of the voltage-controlled oscillator based on the first frequency difference signal, wherein one of the first voltage-controlled oscillation signal and the second voltage-controlled oscillation signal is equalized to a transmitted frequency of the external signal based on the first frequency difference signal and the second frequency difference signal; and a switching unit, switching one of the frequency detector and the phase detector to be electrically connected to the voltage-controlled oscillator.