Magnetic tape head with flux sensing element

Details Magnetic tape head with flux sensing element Magnetic tape head with flux sensing element

1995-07-11

2000-06-20

Klimowicz, William

Dynamic magnetic information storage or retrieval

Head

Hall effect

360119, 360126, G11B 5127, G11B 5147, G11B 539

Patent

active

060784792

ABSTRACT:
A thin film read-write magnetic head useful in a tape apparatus includes a magnetic circuit consisting of two thin film magnetic layers which form a magnetic yoke that is divided into three closely spaced sections, the central section of at least one of the magnetic layers containing an interspace in which a flux sensing element, such as a magnetoresistive device or Hall effect device, is located. The three section yoke forms a continuous magnetic circuit, except for the transducing gap, which circuit consists of three sections corresponding to the three sections of the yoke. The total gap width determines the width of the data track being recorded. During the write mode, a magnetic valve including an electrical conductor provides a shunt path to bypass the flux sensing means so that all three sections of the head operate for recording. During the read mode, only the central yoke section and its transducing gap portion sense the data signal recorded on the magnetic tape, and the read element detects the sensed signal. A saturation current is directed to the valve conductor during the read mode so that the shunt path is open, thereby allowing the flux sensing means to operate and sense the readout signal.

REFERENCES:
patent: 4577250 (1986-03-01), Sato et al.
patent: 5097371 (1992-03-01), Somers
patent: 5097372 (1992-03-01), Fukazawa et al.
patent: 5255141 (1993-10-01), Valstyn et al.

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