A low distortion class-D amplifier. The amplifier comprises a power supply
terminal for receiving power, an amplification stage, and an output
stage. The amplification stage receives an input signal and generates a
ramp signal. Further more, the amplification stage generates a pulse
width modulation signal based on the ramp signal and a hysteretic signal.
The output stage coupled to the power supply terminal receives the pulse
width modulation signal and generates an output. Advantageously, the ramp
signal and the hysteretic signal are positioned at a voltage level that
is half the voltage level of said power supply and that varies
proportionally with said power supply.