Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1997-05-06
1999-07-27
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360104, G11B 5012, G11B 1700
Patent
active
059300728
ABSTRACT:
A head-disk assembly contains an actuator that includes magnetoresistive heads and a preamplifier. The preamplifier is grounded to the actuator, and the actuator is grounded to a baseplate head-disk assembly via a ground conductor. A first inductive loop, which results in noise coupling on the pre-amplifier, exists based on the unequal potential between the actuator and the baseplate. The length of the ground conductor is minimized to reduce the area of the first inductive loop. A second inductive loop arises from a conductive path from the pre-amplifier leads to the baseplate via the actuator suspension, slider body assembly, magnetoresistive head, and magnetic disk media. A reduction of the unequal potential, which results in the second inductive loop, reduces noise coupling onto the inputs of the pre-amplifier. Conditioning of power, signal and control traces are also disclosed.
REFERENCES:
patent: 5482898 (1996-01-01), Marrs
patent: 5583727 (1996-12-01), Parkin
patent: 5656877 (1997-08-01), Loubier
patent: 5699211 (1997-12-01), Magnusson
patent: 5708541 (1998-01-01), Erpelding
Heinz A. J.
Seagate Technology Inc.
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