Magnetically recording apparatus

Details Magnetically recording apparatus Magnetically recording apparatus

1997-02-28

1998-04-14

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327365, 327309, 327320, 327310, 360 46, H03K 353

Patent

active

057397066

ABSTRACT:
A terminating circuit including a pair of diodes connected to have polarities opposite to each other is provided across a magnetic head. When the potential difference across the magnetic head is drastically changed to be equal to or higher than the breakdown voltage of the diodes at the time of switching of a writing current, either one of the diodes breaks down, so that a part of the writing current flows out through the terminating circuit. As a result, ringing due to the drastic change is removed. When the potential difference across the magnetic head is lower than the breakdown voltage of the diodes, since either one of the diodes is reversely biased, the resistance of the terminating circuit is maintained high. Consequently, within this range, the writing current flowing to the magnetic head never flows out to the terminating circuit. As a result, the deterioration of the reading and writing characteristics is prevented.

REFERENCES:
patent: 3365617 (1968-01-01), Flanagan
patent: 3573774 (1971-04-01), Olsen
patent: 3763383 (1973-10-01), Johnson
patent: 4255724 (1981-03-01), Bergero
patent: 5426537 (1995-06-01), Yeh et al.
IBM Technical Disclosure Bulletin, vol. 30, No. 4 Sep. 1987.

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