| 摘要 |
PURPOSE:To obtain a driving circuit which can drive a bias magnetic field pulse with a low power consumption by using plural switching elements, supplying an energy to a bias magnetic field coil from a power source with a high voltage at the time of the leading of the current pulse and returning the energy from the bias coil to the power source with the low voltage at the time of the trailing of the current pulse. CONSTITUTION:By switching ON first and second switches 1 and 2, a current starts the conduction through first power source 6 with a higher direct current voltage through the first switch 1, a bias magnetic field coil 5 and the second switch 2. When the switches 1 and 2 are switched OFF after the leading, simultaneously automatically switches 3 and 4 are switched ON, and a current passage to arrive at the switch 3 the coil 5 the switch 4 a power source 7 is formed. Thus, by using a driving circuit to combine plural switching elements and two different power source voltages, the power consumption of the driving circuit can be widely decreased.
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