Referential signal generating circuit and method, and power factor compensation apparatus including the same

Generating a reference signal for generating a reference signal corresponding to the input signal for a power factor correction in the power converter circuit is sampled in accordance with the input signal to the reference clock, each of the holding detector and the sampling for detecting the maximum amplitude of the input signal It includes the input signal and the phase measurement unit for measuring the phase of the sampled input signal based on the input signal of the detected maximum. Therefore, the reference signals may accurately reflect the phase and frequency information of the input signal.