Patent ID: 7531918

Claim:
A power supply module for use in an electronic system having redundant power supply modules connected to a power bus, the power supply module comprising: an output filter further comprising: an output configured to supply a DC signal to the electronic system; an inductor in series with the output; a resistor-capacitor circuit comprising in series a resistor and a capacitor placed in parallel across the output; and a switch in parallel with the resistor operable to short out the resistor when turned on, the switch being operable to be turned on after a time delay upon insertion of the power supply module into the electronic system; and wherein upon insertion of the power supply module into the electronic system during operation of the electronic system, to limit reverse current flow into the power supply module from the power bus for a period of time until steady state voltage conditions exist on the power bus and then to remove the current-limiting resistor, leaving an output inductor-capacitor filter, and upon shorting out of the resistor, the inductor and capacitor are configured to form the inductor-capacitor filter for the DC signal.