| 摘要 |
PROBLEM TO BE SOLVED: To provide a relay drive circuit doing without a special control for switching of an exciting current and capable of curtailing heat radiation volume of a relay by cutting the exciting current supplied to a relay coil in a simple circuit structure. SOLUTION: The relay drive circuit is provided with an electric connection path P1 connected between a power source line 11 and a ground GND and inserted with relay coils 15a, 15b connected in parallel with the relays 13a, 13b, a switching circuit 17 inserted in the electric connection path P1 so as to be in series with the relay coils 15a, 15b connected in parallel, a resistor 19 inserted between the parallel connected relay coils 15a, 15b and a power source line 11 side (or a ground GND side) of the switching circuit 17, and a capacitor 21 connected in parallel with a series connection between the parallel connected relay coils 15a, 15b and the switching circuit 17. COPYRIGHT: (C)2005,JPO&NCIPI
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