Ballast circuit for a fluoroescent lamp

Details Ballast circuit for a fluoroescent lamp Ballast circuit for a fluoroescent lamp

1988-03-28

1990-05-15

Mis, David

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315119, 315219, 315DIG2, 315DIG4, 315DIG5, H05B 4136

Patent

active

049260979

ABSTRACT:
A ballast circuit for a fluorescent light bulb of the type having an elongated envelope with an electrode at each end. The ballast circuit includes a square wave generator which generates a square wave in excess of 10,000 hertz. The output from the square wave generator is used to modulate a voltage from a power source having a voltage in the range of 400-800 volts so that the modulated voltage has a frequency equal to the square wave frequency. The resulting modulated voltage is then electrically connected to the electrodes of the fluorescent lamp which illuminates the lamp.

REFERENCES:
patent: 4488090 (1984-12-01), Hancock
patent: 4698554 (1987-10-01), Stupp et al.
patent: 4700113 (1987-10-01), Stupp et al.
patent: 4754199 (1988-06-01), Parker

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