Patent ID: 6150880
Filing Date: 2000-11-21
Classification: G01R,H02M

Abstract:
In an amplifier power output stage containing first, second, third and fourth switch elements arranged in a bridge circuit connected across a voltage source, said bridge circuit having a first bridge branch in which said first and second switch elements are connected in series and a second bridge branch in which said third and fourth switch elements are connected in series, a method for generating respective drive signals for said first, second, third and fourth switch elements comprising the steps of:generating a start signal and a stop signal for a voltage pulse of an output voltage of said output stage dependent on an on-duration value;generating a first changeover signal and a second changeover signal dependent on said start signal and said stop signal;generating respective drive signals for said first and second switch elements dependent on said first changeover signal; andgenerating respective drive signals for said third and fourth switch elements dependent on said second changeover signal.