Patent ID: 7282899

Claim:
An active impedance current-sharing circuit comprising: a power supply in electrical communication with a current sense resistor; a differential amplifier in electrical communication with the current sense resistor; a gate adjust amplifier in electrical communication with the differential amplifier; an ORing MOSFET operating in its linear region in electrical communication with the gate adjust amplifier and the current sense resistor; a current share resistor in electrical communication with a current share bus and the gate adjust amplifier; and a current share output in electrical communication with the ORing MOSFET, wherein the circuit allows two or more power supplies that are not designed for current share to be connected in parallel and current share by actively modulating the ORing MOSFET between its linear and fully enhanced regions; wherein pole-zero compensation is utilized to modify a bandwidth of a response for stability and speed in aiding the circuit in recovering from transient conditions; wherein voltage across the current share resistor indicates whether the current share output is sourcing less than or greater than 50% of a load current; and wherein the current share bus is equal to half of the load current.