FIELD: erasing records from hard and floppy disks, magnetooptical disks, magnetic tapes, and the like. SUBSTANCE: magnetic medium is exposed to time-shifted pulses of relatively perpendicular magnetic fields; device for erasing records from magnetic media has solenoid , capacitor, power supply and first switch, control unit, magnetic-field amplitude-and-time parameter sensor, and second switch. EFFECT: enhanced uniformity and reliability of record erasing from magnetic media; reduced power requirement. 7 cl, 8 dwg
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Authors
Dates
2003-11-27—Published
2002-02-12—Filed