Patent ID: 7038535
Filing Date: 2006-05-02
Classification: H03F

Abstract:
1. A pulse-width modulated digital amplifier comprising: a loop filter for producing a stable loop output signal Ew from an input digital signal Ei, the loop filter including an nth order integrator, n having an integer value greater than one, the nth order integrator comprising a first integrator(s) and m additional integrators, m having an integer value, equal to or greater than one; a comparator for receiving loop output signal Ew and a pre-selected signal, the comparator generating a pulse-width modulated signal Ep from the pre-selected signal and signal Ew, a switching output stage for receiving pulse-modulated signal Ep and generating an output signal Eo; and a feedback loop for channeling a portion of the signal Eo to the loop filter input and combining with the input digital signal Ei.