Patent ID: 7019474

Claim:
A constant current regulator, comprising: a transformer having first and second primary windings and at least one secondary winding; a transistor power switch module, comprising: a first pulse-width modulator (PWM) transistor for receiving current from an AC power source and forming a train of current pulses over a first portion of an AC cycle in response to a controlled pulsed gate voltage signal; a second pulse-width modulator (PWM) transistor for receiving current from said AC power source and forming a train of current pulses over a second portion of said AC cycle in response to a controlled pulsed gate voltage signal; a first half-cycle transistor for receiving said current pulses from said first PWM transistor and supplying modified current pulses to said first primary winding; a second half-cycle transistor for receiving said current pulses from said second PWM transistor and supplying modified current pulses to said second primary winding; a driver circuit for alternatingly providing pulsed gate voltages to said first and second PWM transistors for driving thereof on differing portions of said AC cycle; wherein the pulse widths of said current pulses from said first and second half-cycle transistors are controlled to provide a uniform current to a power-consuming load.