Electric lamp and discharge devices: systems – Current and/or voltage regulation
Reexamination Certificate
2005-07-05
2005-07-05
Wong, Don (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
C315S247000, C315S307000, C315S219000, C463S041000, C463S023000, C463S020000, C463S023000, C463S023000, C463S021000
Reexamination Certificate
active
06914394
ABSTRACT:
The invention relates to a supply circuit for a load, and in particular to an electronic ballast for a lamp having such a supply circuit. In order to drive a switching transistor T1of the supply circuit, a forcing circuit ZS is used which is supplied by the supply circuit. At the start of operation, an oscillation of an oscillator circuit OS, which can preferably serve as an amplifier for the forcing circuit ZS in the continuous operating mode, is used for driving.
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patent: 6222746 (2001-04-01), Kim
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patent: 2003/0146714 (2003-08-01), Buonocunto
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patent: WO 01/26213 (2001-04-01), None
patent: WO 01/61832 (2001-08-01), None
Search Report (5 pages) for corresponding European application; search report was issued by the European Patent Office on Nov. 17, 2004.
Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
Tran Chuc
Wong Don
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