Patent ID: 7291938

Claim:
Apparatus for supplying power to a load device that is unable to tap into a power source, comprising: a plurality of signal lines connected to said load device that is unable to tap into a power source; at least a first device that provides first and second potentially time varying signals on first and second ones of said signal lines to said load device, wherein said first and second time varying signals are information bearing signals; a power extractor that extracts voltage/current from said first and second potentially time varying signals and provides first and second voltage/current signals, wherein positive going portions of said first and second potentially time varying signals are combined in an additive manner to provide said first voltage/current signal and negative going portions said first and second potentially time varying signals are combined in an additive manner to provide said second voltage/current signal; and a power conversion circuit that converts said first and second voltage/current signals to a plurality of dc voltages that are provided to said load device that is unable to tap into a power source.