US Patent 7279944 Clock signal generator with self-calibrating mode

A clock signal generator and method thereof are provided for a system to generate an output signal. The apparatus comprises: a delay circuit for generating a delayed clock with a first time, a delay module for generating delayed signal(s), and a decision circuit for comparing the delayed signal(s) with the delayed clock to obtain the relative relation between the delay time and the first time and controlling a delay time of an input signal according to the relative relation to generate the output signal.