Patent ID: 6982547

Claim:
A variable amplitude voltage regulator for use in a power factor correction system including in combination: a resistor scaling network consisting of at least one variable resistor comprising at lease one bi-polar transistor having a base, an emitter, and a collector, the collector emitter path of which is connected in parallel with a fixed resistance; a source of rectified alternating current input voltage (ACR) coupled to the resistor scaling network; a voltage error differential amplifier coupled to the ACR and to a reference signal to produce a voltage error signal (VES); a digital signal processing (DSP) circuit; means coupling the VES to the DSP to produce an output signal at a predetermined frequency with an adjustable duty ratio (DR); means coupling the ACR with the collector emitter path of the transistor and the output signal from the DSP to the base of the transistor to produce a demand level control signal which varies as a function of the VES dc level.