Magnetic head swing clamp and cross-talk eliminator for read/wri

Details Magnetic head swing clamp and cross-talk eliminator for read/wri Magnetic head swing clamp and cross-talk eliminator for read/wri

1992-05-04

1993-10-26

Shepperd, John

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

G11B 502

Patent

active

052571467

ABSTRACT:
A magnetic head swing clamp configured for interconnection with a read/write preamplifier of the type including a read differential transistor pair connected to an inductive head. The collectors of the transistors in the read differential transistor pair provide first and second read output signals at first and second read output terminals for connection to a read amplifier. The magnetic head swing clamp comprises a reference voltage generator which produces first and second reference voltage levels at first and second reference voltage output terminals. Positive and negative voltage clamps are electrically connected to the first and second reference voltage output terminals, respectively, and to the first and second read output terminals. The positive and negative voltage clamps clamp voltage swings in the first and second read output signals as functions of the first and second reference voltage levels. The clamping action prevents emitter-base break down of the read differential transistor pair and cross-talk between parallel-connected read/write preamplifiers during write mode operations.

REFERENCES:
patent: 3581110 (1971-05-01), Belcastro
patent: 4249219 (1981-02-01), Aoi et al.
patent: 4523238 (1985-06-01), Keel et al.

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