Patent ID: 8339108

Claim:
A circuit comprising: a switch operable for conducting a current flowing through a path that comprises said switch; a first amplifier coupled to said switch and operable for adjusting said current according to an amount of power dissipation associated with said path by comparing a sense voltage indicative of said amount of power dissipation with a predetermined value; and circuitry coupled to said first amplifier and operable for generating said sense voltage based on a first current indicative of said current flowing through said path and based on a second current indicative of a voltage across said path, wherein said circuitry comprises: a first transistor, wherein said first current flows through said first transistor; and a second transistor, wherein said second current flows through said second transistor, wherein a base-emitter diode of said first transistor is coupled to a base-emitter diode of said second transistor, and wherein said sense voltage is determined by the sum of a base-emitter voltage of said first transistor and a base-emitter voltage of said second transistor.