| 摘要 |
<P>PROBLEM TO BE SOLVED: To always secure a fixed drive power source from a two-wire transmission path. <P>SOLUTION: A switch circuit 11 performs the switching of a loop current IL with a high frequency, and a transformer L outputs a high frequency signal generated at a primary side coil L1 by the switching from secondary side coil L2, and a rectifier circuit 12 rectifies and smooths the high frequency signal to generate a DC drive power source VP. <P>COPYRIGHT: (C)2013,JPO&INPIT |
