Abstract: A power line separator, comprising an input for connecting to a source of AC line voltage, an output for connecting to at least one user appliance intended for operation with a source of AC power having similar characteristics to the AC line voltage, and a front-end power factor correction unit coupled between the input and the output for producing from the AC line voltage a sinusoidal voltage that causes no distortion of the AC line voltage, while providing power to none-linear load, or loads with imaginary portion (reactive/inductive).

Abstract: A digital amplifier having a PWM modulator for modulating an analog input signal with a modulation signal so as to produce at an output thereof a pulse width modulated signal. A high power switch is responsively coupled to the output of the PWM modulator for switching between high level d.c. positive and negative voltages in accordance with a logic level of the pulse width modulated signal so as to produce a high power modulated switched signal, and a low pass filter is coupled to an output of the high power switch for filtering out the high frequency components of the signal. A feedback control loop is provided from the output of the high power switch to the analog input signal, and the modulation signal is of generally triangular shape.