Low noise common-emitter preamplifier for magneto-resistive head

Details Low noise common-emitter preamplifier for magneto-resistive head Low noise common-emitter preamplifier for magneto-resistive head

1998-03-30

2000-08-22

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Nonlinear amplifying circuit

327 65, 327 73, 360 67, 330252, H03F 345, H03K 1716

Patent

active

061078735

ABSTRACT:
A preamplifier circuit couple to a magneto-resistive (MR) head used in the read circuitry of a magnetic storage device includes differential amplifiers coupled to receive an input from the MR head and to provide output signals. The preamplifier is designed to provide a low noise level. To minimize noise, transistors of the differential amplifiers provide high current gain and have large device geometries.

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patent: 5742203 (1998-04-01), Van De Plassche et al.
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patent: 5841313 (1998-11-01), Levin et al.
patent: 5862091 (1999-01-01), Bion et al.

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