Patent ID: 7728659
Filing Date: 2010-06-01
Classification: H03F

Abstract:
1. Arrangement for amplifying a pulse-width modulated input signal comprising a pulse-width modulation output stage and a feedback loop arranged to reshape the pulse-width modulated signal applied to the pulse-width modulation output stage, characterized by means for generating a pulse period proportional signal from said pulse-width modulation input signal and a controller for controlling said feedback loop therewith; characterized in that said arrangement comprises an error correction signal generator arranged to compare a pulse-width modulated output signal of the output stage with the pulse-width modulated input signal and to supply an error correction signal resulting from this comparison and limited integrating reshaping means arranged to receive the pulse-width-modulated input signal and the error correction signal and to supply a reshaped pulse-width modulated signal to the input of the output stage; and characterized in that said controller comprises a multiplier to multiply the error correction signal, prior to its application to the reshaping means, by said pulse-period proportional signal.