Patent ID: 7154234

Claim:
A voltage regulator circuit for in-line lamp fixtures and in-line power circuits for lamps and LED arrays to provide a switching power cycle circuit to maintain an average output voltage of 11.6 V AC within the range of from 11.0 to 12.5 V AC, said voltage regulator circuit comprising, in combination: (a.) an AC power source comprising an 12 to 15 V AC power supply of an input power circuit; (b.) an AC full wave rectifier bridge circuit and filter capacitor to provide voltage feedback; (c.) a voltage sensing circuit of said feedback voltage across the output of said AC full wave rectifier bridge circuit and filter capacitor, said voltage sensing circuit comprising a zener diode to bias a transistor in the AC power line control circuit and a resistor bridge network of two resistors; (d.) an AC power line voltage control switching power cycle circuit acrosss said AC full wave rectifier bridge circuit and filter capacitor and across said voltage sensing circuit to maintain a switching power cycle of 120 times per second, said AC power line voltage control switching power cycle circuit comprising a resistor as a gate control limiter, a switching cycle optoisolator triac driver, a voltage-level power output control triac, a transistor biased by said zener diode of said voltage sensing circuit to control said switching cycle optoisolator triac driver and said voltage-level power output control triac, and a diode and current limiting resistor to provide a feedback voltage from power input to initiate conduction of power output control triac at application of power and initiate said switching power cycle.