| 摘要 |
The present invention provides a voltage detecting circuit comprising: at least a low voltage detecting circuit for detecting that a power voltage is lower than at least a predetermined reference voltage; at least a high voltage detecting circuit for detecting that the power voltage is higher than the at least a predetermined reference voltage; and a controller being connected to the at least a low voltage detecting circuit and the at least a high voltage detecting circuit for detecting that the power voltage is higher than the at least a predetermined reference voltage; and a controller being connected to the at least a low voltage detecting circuit and the at least a high voltage detecting circuit so that the controller receives an output signal from the at least a high voltage detecting circuit in order to place the at least a low voltage detecting circuit into selected one of operable and inoperable states in accordance with the output signal from the at least a high voltage detecting circuit.
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