Patent ID: 8134405

Claim:
A device comprising: a first main power supply line receiving a first power voltage; a first auxiliary power supply line; a second main power supply line receiving a second power voltage; a second auxiliary power supply line; a first transistor inserted between the first main power supply line and the first auxiliary power supply line, and connecting, when rendered conductive, the first main power supply line with the first auxiliary power supply line; a second transistor inserted between the second main power supply line and the second auxiliary power supply line, and connecting, when rendered conductive, the second main power supply line with the second auxiliary power supply line; an internal circuit coupled between the first auxiliary power supply line and the second auxiliary power supply line, and activated in response to appearance of a voltage between the first auxiliary power supply line and the second auxiliary power supply line to perform a circuit operation on an input signal supplied thereto; and a control circuit coupled to the first and second transistors and the internal circuit and including first, second and third circuit portions, the first circuit portion being responsive to a command signal to generate the input signal and supplying the input signal to both of the second and third circuit portions, the second circuit portion receiving the input signal and rendering the first and second transistors conductive in response to the input signal, and the third circuit portion receiving the input signal from the first circuit portion and supplying the input signal to the internal circuit after the first and second transistors have been rendered conductive, wherein the control circuit receives a clock, the first circuit portion of the control circuit generates the input signal in response to one of rising and falling edges of the clock, the second circuit portion of the control circuit renders the first and second transistors conductive in response to the one of rising and falling edges of the clock, and the third circuit portion of the control circuit supplies the input signal to the internal circuit in response to the other of the rising and falling edges of the clock following the one of the rising and falling edges of the clock.