Electric lamp and discharge devices: systems – Current and/or voltage regulation
Reexamination Certificate
2007-01-26
2011-11-22
Ismail, Shawki S (Department: 2819)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
C315S2090CD, C315S244000, C315S082000
Reexamination Certificate
active
08063580
ABSTRACT:
A pair of magnetically coupled inductors forms a current-compensated choke arrangement for reducing electromagnetic disturbances and for weakening the effects of glitch pulses during the ignition of a high-pressure discharge lamp. To further reduce these disturbances and glitch pulses, a resistor having a resistance value that is based on the impedance of the inductors within a given frequency range is arranged in series between a voltage source and the ignition device of the high-pressure discharge lamp. A filter capacitor across the input side of the current-compensated choke also further reduces these disturbances and glitch pulses.
REFERENCES:
patent: 5892332 (1999-04-01), Drews et al.
patent: 2005/0001559 (2005-01-01), Batz
patent: 19951114 (2001-03-01), None
Saveliev Anatoli
Tochadse Gennadi
Ismail Shawki S
Koniklijke Philips Electronics N.V.
Tran Jany
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