Patent ID: 6950896

Claim:
An apparatus for a controlled application of power to a circuit card while connecting the circuit card to a powered bus, the powered bus including early power and normal power, comprising: a temporary power source coupled to and supplied by the early power and including a first output for providing power to the circuit card during a reset time period of lower current draw when only the early power is connected to the circuit card, the reset time period beginning when the circuit card is first connected to the powered bus; and a primary power source coupled to and supplied by the first output of the temporary power source for providing power to the circuit card during the reset time, and also coupled to and supplied by the normal power for providing power to the circuit card during a normal operation time period of higher current draw when the normal power is connected to the circuit card and replaces the power provided by the temporary power source, the normal operation time period beginning near an end of the reset time period; wherein the temporary power source presents a low input capacitive load to the early power.