Patent ID: 8217530

Claim:
A system, comprising: a power bus operable for delivering a first power from a first power source to an output node; and a circuit coupled to said power bus and said output node and operable for monitoring a current flowing through said power bus, wherein said circuit comprises: a current control block coupled to said power bus operable for comparing said current with a first threshold, wherein said current control block further comprises a first amplifier operable for comparing said current with a second threshold and for generating a first current signal indicating a first difference between said current and said second threshold, wherein said circuit is operable for providing a second power from a second power source to said output node based on said current and said first threshold, and the amount of said second power is adjusted based on said first current signal, and wherein said first amplifier sinks a first source current from a first current control power source at the output of said first amplifier for modifying said first current signal when said current is greater than said first threshold but less than said second threshold.