| 摘要 |
An electronic device includes a power supply, a voltage sampling circuit, a processor, and a switching unit connected between the processor and the voltage sampling circuit. The voltage sampling circuit samples the voltage of the power supply. The processor monitors the sampled voltage. The processor further generates a first control signal when the electronic device is powered off. The switching unit cuts off the electrical connection between the power supply and the voltage sampling circuit in response to the first control signal.
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