Patent ID: 8098091

Claim:
A method in the compensation of unlinearities in an amplifier consisting of a pulse-width modulator ( 4 ), wherein a signal is pulse-width modulated to provide a pulse-width modulated small-signal ( 5 ), and wherein the pulse-width modulator ( 4 ) has an output controlling a set of change-over switches ( 6 ) which feed a load ( 9 ) with a pulse-width modulated great-signal ( 7 ) by means of a voltage supply ( 12 ), characterized in that the inevitable error, which manifests itself in that the pulse widths of the pulse-width modulated great-signal ( 7 ) differ from the pulse widths of the pulse-width modulated small-signal ( 5 ), is detected as an error signal which is used for changing the pulse-width modulation, said pulse-width modulated small-signal being varied in a manner which corresponds to the detected error signal.