Patent ID: 8471414

Claim:
A low impedance polarity conversion circuit for driving a load with a DC power source having a first pole from which a first DC signal originates and a second pole from which a second DC signal originates, the first DC signal having a voltage greater than a voltage of the second DC signal, the conversion circuit comprising: a circuit output node through which an output DC signal is delivered from the conversion circuit to the load; a charge conditioning circuit for generating third and fourth DC signals, said third DC signal having a voltage greater than the first DC signal voltage and said fourth DC signal having a voltage less than the second DC signal voltage; a rectification circuit including: first and second inputs for attachment to the first pole and the second pole; and a transistor bridge electrically connected to said first and second inputs, said bridge including first and second pairs of cooperating transistors, said third voltage controlling a first of said first pair of transistors and a first of said second pair of transistors, and said fourth voltage controlling a second of said first pair of transistors and a second of said second pair of transistors, said bridge for rectifying the first and second DC signals in order that said output DC signal is the same polarity irrespective of whether said first input is attached to the first pole or the second pole.