Low distortion memory write current head drive

Details Low distortion memory write current head drive Low distortion memory write current head drive

1995-04-10

1996-07-23

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327108, 327377, 327382, 327423, 327170, 360 46, 360 67, H03K 301, H03K 102

Patent

active

055393420

ABSTRACT:
An electrical current-switching driver circuit is provided for switching current through an inductive memory write head on a memory storage device. The driver circuit provides means for reducing distortion in the output current waveform and for minimizing occurrences of breakdown in the switching transistors in the circuit. The circuit uses AC coupling circuitry and small DC holding currents to linearize the current transition during switching transients, thereby eliminating discontinuities which would otherwise appear in the head current output waveform, midway through the switching transients.

REFERENCES:
patent: 3770986 (1973-11-01), Drehle
patent: 4381487 (1983-04-01), Erickson
patent: 5107142 (1992-04-01), Bhamidipaty
patent: 5280196 (1994-01-01), Shinozaki
patent: 5379208 (1995-01-01), Shinozaki

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