Electronic ballast

Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Flashers

Reexamination Certificate

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C315S2090SC, C315S291000

Reexamination Certificate

active

11405823

ABSTRACT:
An electronic ballast for driving at least one lamp comprising a rectifying circuit operatively connectable to an AC line; a current drawing circuit connected across said rectifying circuit; and an inverter circuit connected to said rectifying circuit that supplies a lamp current to said at least one lamp; wherein said current drawing circuit draws current from said AC line when the instantaneous voltage of said AC line nears zero to reduce the total harmonic distortion of the input current drawn by said ballast.

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