Abstract: A digital power amplifier system includes means providing a signal having predetermined characteristics is digitally synthesized and applied as input signals to a digital symmetrical pulse width modulator. The digital pulse width modulated signals are amplified in a digital or switching power amplifier. The resulting signals are then passed through a tuning or filter circuit to produce an analog signal having the desired frequency and wave shape characteristics which is then applied to a suitable load device. In the thus provided amplification system all of the amplification is accomplished through digital circuitry with no analog influence until the amplified circuits are applied to the tuning or filter elements.