Preamplifier circuit arrangements for common current flow in a t

Details Preamplifier circuit arrangements for common current flow in a t Preamplifier circuit arrangements for common current flow in a t

1994-09-08

1996-08-06

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

327561, G11B 502

Patent

active

055439799

ABSTRACT:
A preamplifier circuit arrangement for a magnetic or magneto resistive transducer, such as a record/replay head, in which a cascode preamplifier stage, and a stage providing a floating reference voltage for a following amplifier, are linked by an emitter coupled pair of transistors, one in each stage, such that the d.c. currents in the two stages flow in common through the transducer.

REFERENCES:
patent: 4195267 (1980-03-01), Stanley
patent: 5132852 (1992-07-01), Price, Jr.
patent: 5150073 (1992-09-01), Murari et al.
patent: 5331478 (1994-07-01), Aranovsky

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