Abstract: A method for calculating a metric indicating a symmetry of a signal waveform includes inverting the signal waveform to produce an inverted signal waveform; measuring a first set of peak, bottom, and average values corresponding to the signal waveform by detecting a peak value of the signal waveform, detecting a bottom value of the signal waveform, and detecting an average value of the signal waveform; measuring a second set of peak, bottom, and average values of the inverted signal waveform by detecting a peak value of the inverted signal waveform, detecting a bottom value of the inverted signal waveform, and detecting an average value of the inverted signal waveform; and calculating the metric indicating the symmetry of the signal waveform according to the first set of peak, bottom, and average values of the signal waveform, and the second set of peak, bottom, and average values of the inverted signal waveform.

Abstract: The present invention discloses a multiphase waveform generator capable of performing phase calibration, and a related phase calibration method. The disclosed multiphase waveform generator includes a multiphase waveform generating module and a calibrating module. The multiphase waveform generating module receives an input signal and shifts edges of the input signal by a delay time according to a delay parameter to generate a phase-modified signal. The calibrating module is coupled to the multiphase waveform generating module for calibrating the delay time to reduce a difference between a characteristic value of the phase-modified signal and an expected value, which is calculated according to the delay parameter and characteristic values of a first and a second predetermined periodic signal.

Abstract: The present invention discloses a multiphase waveform generator capable of performing phase calibration, and a related phase calibration method. The disclosed multiphase waveform generator includes a multiphase waveform generating module and a calibrating module. The multiphase waveform generating module receives an input signal and shifts edges of the input signal by a delay time according to a delay parameter to generate a phase-modified signal. The calibrating module is coupled to the multiphase waveform generating module for calibrating the delay time to reduce a difference between a characteristic value of the phase-modified signal and an expected value, which is calculated according to the delay parameter and characteristic values of a first and a second predetermined periodic signal.