MR preamplifier having feedback loops for minimizing differentia

Details MR preamplifier having feedback loops for minimizing differentia MR preamplifier having feedback loops for minimizing differentia

1992-12-18

1994-07-05

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360113, G11B 502, G11B 5127, G11B 5133

Patent

active

053273036

ABSTRACT:
A preamplifier circuit amplifies signals from a magneto-resistive element. The preamplifier circuit utilizes a voltage regulator to regulate one terminal of a magneto-resistive element at a predetermined voltage. A first feedback loop is used to minimize a differential DC component and a differential low frequency component of the differential output signal. A second feedback loop is utilized to cause a common mode component of the differential output signal to track an externally supplied reference voltage. The preamplifier of the present invention protects the magneto-resistive elements from short circuits of the disc medium, is powered by a single-ended power supply, and is capable of being coupled with other circuitry without physical coupling capacitors.

REFERENCES:
patent: 3814863 (1974-06-01), O'Day et al.
patent: 4040113 (1977-08-01), Gorter
patent: 4191977 (1980-03-01), Lewkowicz
patent: 4492997 (1985-01-01), Arai et al.
patent: 4520311 (1985-05-01), Petr et al.
patent: 4580178 (1986-04-01), Wuori et al.
patent: 4706138 (1987-11-01), Jove et al.
patent: 4712144 (1987-12-01), Klaassen
patent: 4716306 (1987-12-01), Sato et al.
patent: 4743861 (1988-05-01), Jove et al.
patent: 4786993 (1988-11-01), Jove et al.
patent: 4833559 (1989-05-01), Belk
patent: 4879610 (1989-11-01), Jove et al.
patent: 4914398 (1990-04-01), Jove et al.
patent: 5032935 (1991-07-01), Jove et al.
patent: 5103353 (1992-04-01), Jove et al.
patent: 5122915 (1992-06-01), Klein et al.
patent: 5229894 (1993-07-01), Collins et al.
patent: 5235472 (1993-08-01), Smith
Magneto-Resistive Heads to Spur DCC, Computer Technology Review, vol. XII, No. 15, pp. 16, 21, Dec. 1992.

Affiliated with

Also associated with

Rating

MR preamplifier having feedback loops for minimizing differentia does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with MR preamplifier having feedback loops for minimizing differentia, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MR preamplifier having feedback loops for minimizing differentia will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-800560