Variable impedance electronic ballast for a gas discharge device

Details Variable impedance electronic ballast for a gas discharge device Variable impedance electronic ballast for a gas discharge device

1988-02-11

1990-06-19

Mis, David

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch in the primary circuit of the supply...

315221, 315224, 315307, 315DIG7, H05B 4124, H05B 4136

Patent

active

049356739

ABSTRACT:
A parallel RC network sensitive to the impedance of a gas discharge device is provided in the electronic ballast of this device along with a series connected inductive coil. As the impedance through the device changes, the oscillator frequency of the ballast would change accordingly and the voltage through the coil would change, thereby changing the impedance in such a manner as to insure that the voltage through the gas discharge device remains unchanged. The ballast would include a switch-mode, push-pull oscillator including a pair of emitter-resistors and a pair of fast diodes.

REFERENCES:
patent: 4134044 (1979-01-01), Holmes

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