Patent ID: 6760238
Filing Date: 2004-07-06
Classification: H02M

Abstract:
A digital pulse width modulator (PWM) control circuit, comprising:a) a first input being a sample of a DC output; b) a second input being coupled to the DC output and possessing a ripple signal in synchronization with a DC output component; c) a voltage reference for determining a desired DC output; d) an adjustment amplifier having a portion of the DC output and the voltage reference as inputs, thereby amplifying a first difference; and e) a comparator having the first input and the output of the adjustment amplifier as inputs thereto with the second input overlaying one of the comparator inputs, the comparator comparing a second difference; thereby a determination is made as to whether the DC output is above or below the desired DC output and a correction is performed to change the DC output to a set of values as close to the desired DC output as possible.