Patent ID: 6664769
Filing Date: 2003-12-16
Classification: G05F

Abstract:
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 R2 and three fixed resistors R1, R3 and R4; 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); and means coupling the VES to the resistor scaling network along with the ACR, wherein the resistor scaling network produces a demand level control signal (DLS) in accordance with the following formula: DLS=(R2R1+R2)Ã—(1+R4R3)Ã—ACRwherein R2 varies as a function of the VES dc level.