Integral crystal-controlled line-voltage ballast for compact RF

Details Integral crystal-controlled line-voltage ballast for compact RF Integral crystal-controlled line-voltage ballast for compact RF

1984-08-06

1986-12-23

Dixon, Harold

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Plural discharge devices and/or rectifiers in the supply...

315248, H05B 3700

Patent

active

046314490

ABSTRACT:
A ballast circuit for a fluorescent lamp including a rectifier-filter for coupling to an AC power supply to generate a DC voltage, an oscillator circuit coupled to said DC voltage for developing an RF oscillator signal, and switching signal means for developing concurrent oppositely phased switching signals at the frequency of said oscillator signal to drive series connected power transistors. The common output of the power transistors is coupled to energize a fluorescent lamp coil and regenerative feedback means for generating a signal to aid in switching the power transistors.

REFERENCES:
patent: 4048541 (1977-09-01), Adams et al.
patent: 4060752 (1977-11-01), Walker
patent: 4251752 (1981-02-01), Stolz
patent: 4277728 (1981-07-01), Stevens
patent: 4388563 (1983-06-01), Hyltin
patent: 4415838 (1983-11-01), Houkes
patent: 4415839 (1983-11-01), Lesea
patent: 4471269 (1984-09-01), Ganser et al.
patent: 4484107 (1984-11-01), Kaneda

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