Feedback circuit for DC/AC inverter

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit

Reexamination Certificate

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Details

C315S307000, C363S016000

Reexamination Certificate

active

07952296

ABSTRACT:
A feedback circuit is utilized in a DC/AC inverter having a first power switch and a second power switch for driving a fluorescent lamp. The feedback circuit includes a protection circuit for disabling the first power switch and the second power switch when no fluorescent lamp is electrically connected, a first capacitor having a first terminal electrically connected to an output of the DC/AC inverter, a second capacitor having a first terminal electrically connected to a ground, and a second terminal electrically connected to a second terminal of the first capacitor, a diode having an anode electrically connected to the second terminals of the first and second capacitors, and a cathode electrically connected to the protection circuit, and a first resistor having a first terminal electrically connected to the cathode of the diode, and a second terminal electrically connected to the ground.

REFERENCES:
patent: 4307441 (1981-12-01), Bello
patent: 5444333 (1995-08-01), Lau
patent: 5612594 (1997-03-01), Maheshwari
patent: 5619402 (1997-04-01), Liu
patent: 5677602 (1997-10-01), Paul
patent: 5977725 (1999-11-01), Miyazaki et al.
patent: 5982110 (1999-11-01), Gradzki
patent: 6259615 (2001-07-01), Lin
patent: 6396722 (2002-05-01), Lin
patent: 6750842 (2004-06-01), Yu
patent: 1667458 (2005-09-01), None
patent: I270839 (2007-01-01), None

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