Patent ID: 7778324
Filing Date: 2010-08-17
Classification: H03F

Abstract:
1. A pulse width modulation amplification system, comprising: a first pulse width modulator operable to receive an input signal and generate a first pulse width modulated signal therefrom, the first pulse width modulator connected with a first switch-mode power stage and operable to be connected with a load; a second pulse width modulator, the second pulse width modulator operable to receive the input signal and generate a second pulse width modulated signal therefrom that is time offset with respect to the first pulse width modulated signal, the second pulse width modulator connected with a second switch-mode power stage and operable to be connected with a load; a level detector operable to determine a level of the input signal; and a controller operable to, based on the level of the input signal, automatically instruct the second pulse width modulator to adjust the amount by which the second pulse width modulated signal is time offset with respect to the first pulse width modulated signal.