A digital modulator for driving a digital amplifier. The digital modulator has a subtractor which receives a digital input signal. A filter amplifier receives the output of the filter amplifier and is tuned to an idle frequency of the digital modulator. The digital modulator includes a delay element and a digital comparator. The digital comparator receives the output from the filter and applies it to the delay element. A feedback loop couples the output of the delay element to the subtractor.