Patent ID: 7199528
Filing Date: 2007-04-03
Classification: H05B

Abstract:
1. A constant power control circuit that interconnects an output line to a load, said constant power control circuit being connected to a source of DC voltage, having first and second terminals, said constant power control circuit being powered by a DC voltage applied from said source of DC voltage across a pair of input lines, wherein said load is connected at a first end to said output line and a return path connects a second end of said load to both of said pair of input lines, the constant power control circuit comprising: a pair of switching device means connected in series across said pair of input lines, said output line being connected to the junction of said pair of serially connected switching device means; switching control means associated with the switching device means for switching the switching device means to conduct alternatively between positive and negative ones of said pair of input lines at a predetermined high frequency, comprising: