Ballast circuit having enhanced output isolation transformer...

Details Ballast circuit having enhanced output isolation transformer... Ballast circuit having enhanced output isolation transformer...

2005-08-30

2005-08-30

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S274000, C315S278000

Reexamination Certificate

active

06936977

ABSTRACT:
A ballast circuit includes an output isolation transformer having a primary winding and first and second secondary terminals coupled to opposing ballast lamp terminals for additively applying potentials on the primary winding and the first and second secondary winding potentials across the lamp and limiting ground fault voltages. The circuit can include a closed loop feedback path from a load to a feedback rectifier for promoting linear operation of an input rectifier.

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