US4845456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic sensor
Assignee: Alps Alpine Co Ltd
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Filing: 1988-09-15
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Granted: 1989-07-04
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Expires: 2008-09-15
Abstract
Abstract In a magnetic sensor, a first series-connected magnetic resistance element circuit is connected parallel to a second series-connected magnetic resistance element circuit, which finally forms a bridge circuit. The magnetic resistance elements are subdivided into two or three subdivided pieces. These subdivided pieces are arranged at a predetermined interval and connected with each other by conductors having low resistivity.
Inventors
- 👤 Hiraku Abe
- 👤 Ichiro Tokunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:25
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/142; G01D5/145; H; H10; H10N; H10N50/00; H10N50/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A magnetic sensor wherein a first series circuit in which a plurality of magnetic resistance elements are connected in series with each other, is connected parallel to a second series circuit in which another plurality of magnetic resistance elements are connected in series with each other, a bridge circuit is formed where a predetermined junction point between said magnetic resistance elements of said first and second series circuits is used as a signal output terminal, said bridge circuit is positioned opposite to a movable magnetic medium, and an output signal is derived from said signal output terminal which corresponds to a magnetic field produced by said magnetic medium, characterized in that: said magnetic resistance elements are subdivided into a plurality of subdivided pieces in a longitudinal direction thereof, each of said subdivided pieces are arranged in the moving direction of said magnetic medium at a predetermined interval corresponding to a repetition period of said magnetic field, and each of said subdivided pieces is connected by a conductor having low resistivity with each other.
Claim 2
Dependent Claim
173 words
A magnetic sensor wherein a first series circuit in which a plurality of magnetic resistance elements are connected in series with each other, is connected parallel to a second series circuit in which another plurality of magnetic resistance elements are connected in series with each other, a bridge circuit is formed where a predetermined junction point between said magnetic resistance elements of said first and second series circuits is used as a signal output terminal, said bridge circuit is positioned opposite to a movable magnetic medium, and an output signal is derived from said signal output terminal which corresponds to a magnetic field produced by said magnetic medium, characterized in that: said magnetic resistance elements are subdivided into a plurality of subdivided pieces in a longitudinal direction thereof, each of said subdivided pieces are arranged in the moving direction of said magnetic medium at a predetermined interval corresponding to a repetition period of said magnetic field, and each of said subdivided pieces is connected by a conductor having low resistivity with each other.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |