Patent ID: 6628094
Filing Date: 2003-09-30
Classification: H02M,H05B

Abstract:
An apparatus comprising:a pulse width modulation circuit having a first output to provide a first switched signal and a second output to provide a second switched signal, wherein the first switched signal and the second switched signal are 180Â° out of phase; a first drive amplifier having an input coupled to the first output of the pulse width modulation circuit to receive the first switched signal; a second drive amplifier having an input coupled to the second output of the pulse width modulation circuit to receive the second switched signal; a first inductive element having an input terminal coupled to an output terminal of the first drive amplifier and an output terminal; a second inductive element having an input terminal coupled to an output terminal of the second drive amplifier and an output terminal, the output terminal of the second inductive element coupled with the output terminal of the first inductive element; a lamp socket coupled between the output terminals of the first inductive element and the second inductive element and ground; and a capacitive element coupled between the output terminals of the first inductive element and the second inductive element and ground.