Patent ID: 7986176
Filing Date: 2011-07-26
Classification: H03L

Abstract:
1. A clock generating apparatus comprising: a phase-difference measuring device that measures a difference in phase between a reference clock and a feedback clock generated by a divider by using a high-speed clock multiplied by a multiplier; an averager that averages the phase difference measured by the phase-difference measuring device; and an output clock generator that returns a self-generated output clock to the multiplier and the divider and generates an output clock synchronized with the reference clock by using the phase difference averaged by the averager and an operation clock generated by an internal high-precision oscillator, wherein the multiplier generates the high-speed clock by multiplying the output clock returned from the output clock generator, the divider generates the feedback clock by dividing the output clock returned from the output clock generator, and the clock generating apparatus for generating an output clock synchronized with the reference clock, further comprises a first frequency increasing unit that increases a frequency of generation of the output clock in the output clock generator.