Patent ID: 8334705

Claim:
An integrated circuit comprising: logic circuitry for performing one or more operations, the logic circuitry driven by a clock; a first sensing circuit operable to output a voltage V C that is proportional to an instantaneous current consumption I C of the logic circuitry; reference circuitry having one or more logic elements, wherein operation of the logic elements is synchronized to the clock; a second sensing circuit operable to output a voltage V R that is proportional to an instantaneous fluctuating current consumption I R of the reference circuitry; differential circuitry operable to output a voltage difference αV R −V C between a scaled-up version αV R of the voltage V R and the voltage V C , the scaled-up version αV R scaled to approximately the scale of the voltage V C ; a square root circuit operable to receive the voltage difference as input and operable to output a square root of the voltage difference; a dissipative load operable to dissipate an instantaneous power P L ; and a controllable current source controllable by the output of the square root circuit for generating current through the dissipative load.