A power supply for an arc lamp. It includes a DC to DC converter which has an input, an output, and a circuit for increasing the voltage received at the input and for supplying the increased voltage to its output. A current sensing circuit is provided for controlling the amount of current delivered to...http://www.google.com/patents/US4873618?utm_source=gb-gplus-sharePatent US4873618 - Power supply for D.C. arc lamps
