Patent ID: 7782075

Claim:
An electronic device that outputs an output signal in response to an input signal supplied thereto, comprising: a performance circuit that is supplied with the input signal and that outputs the output signal; a power supply wiring that receives a supply power from outside and supplies the supply power to the performance circuit; and a load fluctuation compensation circuit, branching from the power supply wiring, that compensates a fluctuation of the supply power supplied to the performance circuit, wherein the load fluctuation compensation circuit includes, a first delay circuitry section that delays a clock signal supplied thereto by a delay amount that fluctuates by a prescribed first fluctuation amount in relation to a unit fluctuation amount of a power supply voltage supplied to the performance circuit; a second delay circuitry section that is disposed in parallel with the first delay circuitry section and that delays the clock signal supplied thereto by a delay amount that fluctuates by a second fluctuation amount, which is greater than the first fluctuation amount, in relation to the unit fluctuation amount of the power supply voltage supplied to the performance circuit; a load circuit that is connected to the power supply wiring in parallel with the performance circuit; and a phase detecting section that detects a phase difference between the clock signal output by the first delay circuitry section and the clock signal output by the second delay circuitry section and that controls an amount of current consumed by the load circuit based on the detected phase difference.