Ballast circuits for gas discharge lamps
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United States of America Patent
Stats
-
Jul 28, 1992
Grant Date -
N/A
app pub date -
Apr 13, 1990
filing date -
Apr 14, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ballast circuit includes a load circuit. A reservoir capacitor is effective to supply charge to the load circuit. A capacitive charge pump circuit is effective to transfer charge from a charge pump capacitive circuit to the load circuit and to the reservoir capacitor. The load circuit includes the primary winding of a transformer. A secondary winding of this transformer is for connection across a discharge lamp. In operation of the ballast circuit, the primary winding of the transformer drives the capacitive charge pump circuit.
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