Abstract: A circuit arrangement for operating a discharge lamp with a high frequency current comprising input terminals for connection to a source of low frequency supply voltage, a rectifier bridge coupled to the input terminals for rectifying the low frequency supply voltage, and an inverter shunting a first capacitor for generating the high frequency current. The circuit arrangement incorporates two power feedback loops to feed power back to an output terminal of the rectifier bridge. As a result the circuit arrangement has a relatively simple configuration, causes only a very limited amount of harmonic distortion and can be realized with relatively cheap and simple components.
Type:
Grant
Filed:
November 12, 1996
Date of Patent:
May 26, 1998
Assignee:
U.S. Philips Corporation
Inventors:
Adan F. J. Hernandez Martucci, Johannes H. Van Bijnen, Patrick J. Zijlstra