Through-zero pulse-width modulation process with period-average-zero

A method comprising:

• a comparator producing a comparison output signal based upon a comparison of a periodic signal and a reference signal;
• and
• subtracting a DC value from the comparison output signal to produce a periodic output signal having an average value that is substantially equal to zero during a period.

An apparatus comprising:

• a comparator unit configured to compare a periodic signal and a reference signal to produce a comparison output signal,
• a function unit coupled to the control signal and to an output of the comparator and configured to subtract from the control signal a DC value to produce a DC corrected reference signal;
• a summing unit coupled to the output of the comparator and configured to sum the DC corrected reference signal with the comparison output signal to produce a periodic output signal.

A non-transitory computer readable storage medium including program instructions executable by a processor to:

• produce a comparison output signal based upon a comparison of a periodic signal and a reference signal;
• and
• subtract a DC value from the comparison output signal to produce a periodic output signal having an average value that is substantially equal to zero during a period.