Pulse starting circuit

Details Pulse starting circuit Pulse starting circuit

2007-10-09

2007-10-09

Vu, David H. (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

C315S224000, C315SDIG002

Reexamination Certificate

active

11313099

ABSTRACT:
A lamp ballast starting circuit and method for a gas discharge lamp is disclosed. The ballast starting circuit includes the inputs of the starting circuit connected to an inverter circuit, the starting circuit generating a pulse at the leading edge of each alternating half cycle of the inverter circuit output, the polarity of the pulse being the same as the polarity of each alternating half cycle of the inverter circuit output. The output of the starting circuit starts a gas discharge lamp.

REFERENCES:
patent: 5075599 (1991-12-01), Overgoor et al.
patent: 5406177 (1995-04-01), Nerone
patent: 5952790 (1999-09-01), Nerone et al.
patent: 6225759 (2001-05-01), Bogdan et al.
Philips Semiconductors; MHN-TD 70W Driver with UBA2030, 39 pages, Feb. 4, 1999.

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