| 摘要 |
The present invention relates to a power managing apparatus utilized for controlling a first supply voltage, a second supply voltage, and a substrate voltage of a digital circuit. The power managing apparatus includes a voltage generating device, for generating a first reference voltage and a second reference voltage; and a voltage switching device, coupled to the voltage generating device, for adjusting the first supply voltage, the second supply voltage, and the substrate voltage. When the digital circuit operates in a first operating mode, the voltage switching device outputs the second reference voltage to the first supply voltage and the substrate voltage; and when the digital circuit operates in a second operating mode, the voltage switching device outputs the first reference voltage to the first supply voltage, and outputs the second reference voltage to the second supply voltage.
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