Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1994-05-25
1995-11-28
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360124, G11B 517
Patent
active
054713544
ABSTRACT:
A servo head in a disk file data storage system includes two servo transducers which are connected so that noise induced by a nearby writing data head cancels. The first servo transducer, mounted on a slider, reads information stored on a servo disk. A second servo transducer, also located on the slider, is connected to the first servo transducer to produce an output signal so that noise signals induced in the first servo transducer by operation of the data transducer tend to be canceled by noise signals induced in the second servo transducer by operation of the data transducer. The two servo transducers are located such that they are closely spaced relative to the size of the servo transducers. The close proximity of the two servo transducers reduces the effect of unequal shielding from noise signals induced in the two servo transducers by the data head.
REFERENCES:
patent: 3582918 (1971-06-01), Tiemann
patent: 4008493 (1977-02-01), Pizzuto
patent: 4012782 (1977-03-01), Lazzari et al.
patent: 4072944 (1978-02-01), Takashima
patent: 4823205 (1989-04-01), Hannon et al.
patent: 4962437 (1990-10-01), Wilcox
patent: 5210669 (1993-05-01), Weispfenning et al.
J. Desserre et al., "New Possibities offered by integrated heads to reduce crossfeed (write to read)", IEEE Transactions On Magnetics, vol. MAG-13, No. 5, Sep. 1977, pp. 1469-1471.
Bortins John
Stageberg Frank
Stover Lance E.
Weispfenning Gerald L.
Psitos Aristotelis
Seagate Technology Inc.
Wilson James T.
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