Patent ID: 6504314
Filing Date: 2003-01-07
Classification: H01J,H05B

Abstract:
A circuit arrangement for supplying a discharge lamp with a DC lamp current comprising only passive components, said circuit comprising:input terminals for connection to a low frequency AC supply voltage source, rectifying means having two input terminals coupled to the input terminals, and two output terminals, for generating a DC voltage from the low frequency AC voltage supplied by said supply voltage source, capacitive ballast means coupled between the input terminals and the output terminals of the rectifying means, and a load circuit coupled to the output terminals of the rectifying means and comprising inductive means and terminals for connection to the lamp, wherein the inductive means and lamp connection terminals form a series arrangement connecting the output terminals of the rectifying means, and the load circuit is devoid of a filter capacitor, wherein the rectifying means comprise a voltage doubler, and the capacitive means comprises two capacitors included in the voltage doubler.