Control circuit for buck converter, has signal converter designed so that absolute difference value between one control signal and amplitude value of sinusoidal signal relates to difference of another signal and amplitude value

摘要

The circuit has a signal converter designed such that an absolute value of difference between one of control signals and an amplitude value of a sinusoidal signal corresponds to the absolute value of difference between another control signal and another amplitude value. A control amplifier (51) and a reference voltage source supplies respective control signals and sinusoidal signals and provide pulse width modulation signals.