| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power source switching circuit capable of uniquely determining the internal power source standard of a device by automatically switching power. SOLUTION: This circuit is provided with first diodes 6 and 8 for transmitting power from a network connector to a network and prevent inverse flow from the network to the network connector, second diodes 7 and 9 for transmitting power from external devices 2 and 3 to the network connector and preventing inverse flow from the network connector to any other external device, and ports 10 and 11 for physically connecting the network connector and the external devices 2 and 3. In this case, the connection with the external devices 2 and 3 is continuously maintained in spite of the state of a power source inside the network connector.</p> |
