| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an AISG device power supply circuit and an AISG device capable of handling a plurality of power supplies and automatically selecting a power supply line having high power efficiency depending on a state of a power supply supplied from the outside. <P>SOLUTION: An AISG device power supply circuit mounted on an AISG device 1 controlling an antenna compliantly to the AISG standard comprises a DC/DC converter 4 outputting voltage of a power supply supplied from the outside after adjusting the voltage to an internal circuit 3 of the AISG device 1, where positive and negative electrodes of an input terminal of the DC/DC converter 4 are electrically connected to a 10-30 V power supply line for mandatory connection and a DC return line respectively. The AISG device power supply circuit further comprises a switching circuit 10 switching a connection destination of the negative electrode of the input terminal of the DC/DC converter 4 from the DC return line to a -48 V power supply line when a -48 V power supply is supplied from the outside. <P>COPYRIGHT: (C)2013,JPO&INPIT |
