Patent ID: 8232668
Filing Date: 2012-07-31
Classification: H04B

Abstract:
1. A method of synchronization point detection for detecting a synchronization point of an alternating waveform of an alternating power based on a comparison of the alternating waveform and a threshold voltage, the method comprising the steps of: detecting a rising point at which the voltage of the alternating waveform changes from a level lower than the threshold voltage to a level equal to or higher than the threshold voltage; detecting a falling point at which the voltage of the alternating waveform changes from a level equal to or higher than the threshold voltage to a level lower than the threshold voltage; measuring a first interval from the rising point to the falling point subsequent to the rising point; measuring a second interval from the falling point to the rising point subsequent to the falling point; and determining the synchronization point based on a difference between the length of the first interval and the length of the second interval.