Patent ID: 7944273

Claim:
An apparatus comprising: a circuit adapted to be connected in parallel with a similar circuit to adjust a load current, the circuit comprising: an input terminal for receiving an input voltage from a source; a first amplifier to sense the load current; and a second amplifier to generate a control signal to adjust the load current, wherein an output of the first amplifier is coupled to first and second signal paths, the first signal path being coupled to a first input of the second amplifier, the second signal path being coupled to a second input of the second amplifier, wherein the first and second signal paths are portions of a feedback mechanism that enables the voltages at the first and second inputs of the second amplifier to change in response to a change in the load current through the circuit, wherein the second input of the second amplifier is coupled to a reference terminal in common with one or more parallel circuits, and the reference terminal has a voltage that is derived from the input voltage.