Class d amplifier capable of anti-clipping

A Class D amplifier for generating a pulse-width modulated output signal based on a DC voltage according to an input signal in a normal mode, comprising:

• a first-stage integrator circuit configured to integrate the difference between the input signal and a feedback signal in the normal mode to generate a first integrated signal, wherein the feedback signal is related to the output signal;
• a final-stage integrator circuit configured to integrate based on the first integrated signal to generate a final-stage integrated signal in the normal mode;
• a summing circuit configured to buffer the final-stage integrated signal to generate a loop filter signal in the normal mode;
• and
• a modulation and driving circuit configured to generate the output signal by comparing the loop filter signal with a triangle wave;
• wherein in a clipping mode, the first-stage integrator circuit enters a reset state or a hold state, the final-stage integrator circuit enters a hold state, and the summing circuit is configured to superimpose the final-stage integrated signal with a feedforward signal to generate the loop filter signal, wherein the feedforward signal is related to the input signal.