| 摘要 |
A first conductive transistor having a high threshold value and a second conductive transistor having a low threshold value are connected in series between a first actual power supply line supplying a power supply voltage and a virtual power supply line connected to a power supply pin of a circuit block constituted of transistors having a low threshold value. The first and second conductive transistors have polarities which are opposite to each other. A power control circuit turns on the first and second conductive transistors while the circuit block is in operation and turning off the first and second conductive transistors while the circuit block is not in operation. Therefore, subthreshold currents of the first and second conductive transistors can be suppressed. As a result of this, it is possible to reduce power consumption of the semiconductor integrated circuit during its standby period.
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