Circuit to limit surges into a dc-operated lamp
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United States of America Patent
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-
Nov 23, 1993
Issued Date -
N/A
app pub date -
Dec 24, 1992
filing date -
Jul 19, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A circuit to limit surges into dc-illuminated lamp, including a rectifier circuit having a smoothing means, an output terminal of the rectifier circuit being connected with a lamp; an inductor connected with an input terminal of the rectifier circuit: a surge-limiting means connected in series with its lamp: and a switching means having the main current path connected in parallel with the surge-limiting means, said switching means becoming conductive when the filament of the lamp is warmed up.
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