| 摘要 |
According to one aspect of the present invention, an apparatus is provided in which a first switching device is used to connect a first node to a second node and disconnect the first node from the second node based upon the value of a first control signal. The first node is continuously connected to a first voltage source. The first switching device is capable of withstanding continuous application of the first voltage source. A second switching device is used to connect the second node to a third node when the first node is disconnected from the second node and to disconnect the second node from the third node when the first node is connected to the second node.
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