Apparatus for protecting memory devices from external shock forc

Details Apparatus for protecting memory devices from external shock forc Apparatus for protecting memory devices from external shock forc

1995-04-28

1997-12-09

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 69, 360 60, G11B 2120

Patent

active

056966458

ABSTRACT:
Circuit for generating a write disable signal in response to an applied shock force. Angular displacements which indicate an excessive shock force are detected, and signal processed to determine whether or not a displacement will result from the shock force exceeding a threshold level. Low frequency displacements are de-emphasized, while higher frequency displacements in a passband of interest are integrated to obtain a displacement function. The displacement function is compared in a threshold detector with a reference threshold displacement level. Displacements which exceed the established threshold displacement will generate a write disable signal.

REFERENCES:
patent: 4862298 (1989-08-01), Genheimer et al.
patent: 4947093 (1990-08-01), Dunstan et al.
patent: 5235472 (1993-08-01), Smith
patent: 5272576 (1993-12-01), Ohtsuka
patent: 5299075 (1994-03-01), Hanks
patent: 5333138 (1994-07-01), Richards et al.
Sedral Smith, Microelectronic Circuits Third Edition, 1991, pp. 30-38, 781-785, 800-805.

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