Arrangement comprising a magnetic write head, and write amplifie

Details Arrangement comprising a magnetic write head, and write amplifie Arrangement comprising a magnetic write head, and write amplifie

1996-11-20

1998-11-24

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

330288, G11B 502

Patent

active

058416030

ABSTRACT:
A write amplifier comprising four current mirrors which are turned on two at a time by two switchable floating current sources between the input terminals of the current mirrors in order to produce a write current of alternating polarity through the write head. The parasitic capacitances across the write head and/or the parasitic capacitances of the write amplifier at the write terminals are compensated by means of feed-forward capacitors. The high impedance at the terminals of the write head enables the common-mode voltage across the write head to be fixed at any desired voltage value by means of a common-mode circuit.

REFERENCES:
patent: 5278912 (1994-01-01), Waldhauer
patent: 5282094 (1994-01-01), Ngo
patent: 5315231 (1994-05-01), Linder et al.
patent: 5559646 (1996-09-01), Voorman et al.
patent: 5568091 (1996-10-01), Ramalho et al.
patent: 5668676 (1997-09-01), Voorman et al.

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