| 摘要 |
PURPOSE:To highten magnetizing set accuracy, by using a magnetizing yoke with a magnetizing coil that can flow unipolar currents for saturated magnetization and damping AC for demagnetization when magnetizing a permanent magnet employed for a magnetic bubble chip, etc. CONSTITUTION:A magnetic bubble module 80, a permanent magnet to be magnetized, is beforehand inserted into aportion for a notch of a magnetizing yoke 70 to which an exciting coil 60 is wound. A DC power source 10, which voltage value can be varied, is connected to the coil 60 through switches 20 and 40, and a diode 31 through a switch 30 and a condenser 50 in addition to that are connected between the coil 60 and a connecting point of the switches 20 and 40 while arranging them in parallel with the coil 60. The accuracy of magnetizing is bettered because the coil 60 can be provided with unipolar exciting coil currents 300 with amplitude IMAG and damping alternating exciting currents 301 with amplitude IIDM continueing to that if this device is formed in this way and the switches 20, 30, 40 are suitably operated. |
