Charge pump interface circuit

Details Charge pump interface circuit Charge pump interface circuit

2007-10-09

2007-10-09

Owens, Douglas W. (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S361000, C307S080000

Reexamination Certificate

active

11289153

ABSTRACT:
A ballast circuit including a charge pump interface circuit is disclosed to provide a method of isolating a switch from a power line used to power a ballast for supplying electrical power to a lamp. In addition, the charge pump interface circuit provides a method to control a discrete dimming ballast circuit which includes one or more inverters. The charge pump interface circuit offers cost advantages because no relays are necessary for isolation of the switch from the lamp electrical power and the dimming ballast circuit can be installed where existing lamps are currently mounted, without the need to add additional wiring.

REFERENCES:
patent: 4477748 (1984-10-01), Grubbs
patent: 5751115 (1998-05-01), Jayaraman et al.
patent: 5834903 (1998-11-01), Christian
patent: 6031338 (2000-02-01), Yoon et al.
patent: 6628091 (2003-09-01), Griffin et al.
patent: 6686705 (2004-02-01), Nerone et al.
patent: 6771029 (2004-08-01), Ribarich et al.
Haiyan Wang, “A Discrete Dimming Ballast for Linear Fluorescent Lamps”, paper submitted in partial fulfillment of requirement for degree, Master of Science at Cleveland State University, Dec. 2003, 57 pages, Cleveland, Ohio, USA.

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