Patent ID: 7099788

Claim:
A multiphase waveform generator comprising: a multiphase waveform generating module for receiving a first input signal and a delay parameter, shifting respective edges of the first input signal by a delay time according to the delay parameter to generate a phase-modified signal; and a calibrating module comprising: a measuring module for receiving a second input signal, measuring a characteristic value that characterizes the position of the edges of the second input signal; and a control module electrically connected to the measuring module for calibrating the delay time to reduce a difference between a characteristic value of the phase-modified signal and an expected characteristic value; wherein the measuring module generates the characteristic value of the phase-modified signal using the phase-modified signal as the second input signal, the control module stores a first reference value which is generated by the measuring module using a first predetermined periodic signal as the second input signal, the control module stores a second reference value which is generated by the measuring module using a second predetermined periodic signal as the second input signal, and the expected characteristic value is calculated according to the first and second reference values, and the delay parameter.