Circuit with improved efficiency and crest factor for...

Details Circuit with improved efficiency and crest factor for... Circuit with improved efficiency and crest factor for...

2007-10-31

2010-11-09

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S2090SC, C315S226000

Reexamination Certificate

active

07830096

ABSTRACT:
A current fed bipolar junction transistor (BJT) based inverter ballast includes base drive circuits configured to drive respective BJT switches, and high-speed drive reverse peak current limiting circuits, configured to operate in conjunction with the respective base drive circuits.

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patent: 7099132 (2006-08-01), Moisin
patent: 7193368 (2007-03-01), Chen et al.
patent: 2006/0050542 (2006-03-01), Chan et al.
patent: 2006/0103317 (2006-05-01), Chen et al.
patent: 2006/0103328 (2006-05-01), Chen et al.
patent: 2007/0025123 (2007-02-01), Kim et al.
patent: WO2006/051459 (2006-05-01), None
PCT/US2008/076024 International Search Report, mailed Nov. 18, 2008.
U.S. Appl. No. 11/645,939, filed Dec. 27, 2006, Chen et al.

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