Preamplifier circuit and method for a disk drive device

Details Preamplifier circuit and method for a disk drive device Preamplifier circuit and method for a disk drive device

2006-08-29

2006-08-29

Tran, Thang V. (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

C360S046000

Reexamination Certificate

active

07099098

ABSTRACT:
An amplifying circuit and method are disclosed for amplifying electrical signals, such as electrical signals generated by the read head of a disk drive. The circuit includes a pair of cross-coupled differential amplifier circuits. Each differential amplifier circuit is asymmetric, including two input transistors of different transistor types. For instance, a first of the two input transistors of each differential amplifier circuit may be a bipolar transistor and a second of the two input transistors may be a field effect transistor. By utilizing asymmetric differential amplifier circuits, a relatively wider operating frequency range is obtained.

REFERENCES:
patent: 4134078 (1979-01-01), Arai et al.
patent: 4939478 (1990-07-01), Heimsch et al.
patent: 5394182 (1995-02-01), Klappert et al.
patent: 5515005 (1996-05-01), Yoshioka
patent: 5608352 (1997-03-01), Itakura
patent: 5990743 (1999-11-01), Gabara
patent: 6057737 (2000-05-01), Pritchard
patent: 6580323 (2003-06-01), Mateman et al.
patent: 6707626 (2004-03-01), Esumi
patent: 2002/0089377 (2002-07-01), Hwang

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