Patent ID: 7279944

Claim:
A signal generator, utilized in a system, for generating an output signal, the signal generator comprising: a delay circuit, for delaying a reference signal for a first time to generate a delayed clock; a delay module, comprising a plurality of delay cells, for delaying the reference signal by at least one of the delay cells to generate at least one delayed signal, wherein each delay cell has a substantially fixed delay time; a first multiplexer, coupled to the delay module, for selectively outputting the reference signal or an input signal to the delay module according to a mode of the system; and a decision circuit, coupled to the delay circuit and the delay module, for determining a relationship between the delay time of the delay cell and the first time of the delay circuit according to the delayed clock and the at least one delayed signal, and for controlling a delay time of the input signal based on the relationship to generate the output signal.