| 摘要 |
A voltage supply circuit is capable of improving an operating speed of the circuit while lowering power consumption. An internal power supply voltage that is dropped and an internal ground voltage that is raised, from an external power supply, are generated and then supplied to an internal circuit. Therefore, when the circuit is driven, a swing width of a signal is reduced to reduce a dynamic power. When the internal circuit is driven at a low voltage, the back bias of a transistor is varied to lower the threshold voltage. Thus, the operating speed can be improved. Also, in a standby mode, the threshold voltage is increased to minimize the amount of current flowing at a sub-threshold voltage below the threshold voltage, thus reducing a static power.
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