| 摘要 |
PROBLEM TO BE SOLVED: To reduce the amount of wire harness to a solenoid by improving constitution of a solenoid drive device. SOLUTION: A resistor 32 for current detection is connected with the other end of the solenoid 30 whose one end is connected with ground G. An NMOS 33 and the cathode of a diode 34 are connected with the resistor 32. The anode of the diode 34 is connected with the ground G. When the NMOS 33 is turned on, a current flows in the solenoid 30 from a battery 31 via the resistor 32. When the NMOS 33 is turned off, a regenerative current flows in the solenoid 30 from the ground G via the diode 34 and the resistor 32. As a result, current driving of the solenoid 30 is enabled without connecting the anode of the diode 34 with the solenoid 30 by using a lead wire.
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