Signal reproducing apparatus using movement of magnetic wall

Details Signal reproducing apparatus using movement of magnetic wall Signal reproducing apparatus using movement of magnetic wall

1997-09-18

1999-09-21

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369116, G11B 1100

Patent

active

059562978

ABSTRACT:
In a signal reproducing apparatus, information is reproduced by moving a magnetic wall on a magnetic recording medium while effecting relative movement between a light spot and the medium. A light spot is irradiated for forming a temperature distribution for moving the magnetic wall on the medium. A differential detecting unit takes a positive or negative value in accordance with a direction of magnetization in the light spot. An edge detecting unit takes a positive or negative value in accordance with directions of magnetization, before and after the magnetic wall as a boundary, in the relative moving direction in the light spot. A reproduction signal is generated on the basis of the detection result from the differential detecting unit and the detection result from the edge detecting unit.

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