Patent ID: 7411447

Claim:
A dynamic pulse width modulation (PWM) amplifier, comprising: an input terminal receiving an input signal; a dynamic PWM controller transforming an N-bit input signal sampled by a sampling frequency to a 1-bit PWM signal, wherein N is an integer greater than or equal to one; a power stage receiving and outputting the 1-bit PWM signal; a low pass filter receiving and outputting the 1-bit PWM signal from the power stage, wherein the 1-bit PWM signal is used to drive the power stage and the low pass filter; and an output terminal outputting the 1-bit PWM signal; wherein the dynamic PWM amplifier is characterized in the dynamic PWM amplifier uses a register array to store the input signal processed immediately in each frame, regroups the input signal, and outputs the regroup input signal, so that the 1-bit PWM signal is changed according to the input signal.