EP0323187A2
Expired / Lapsed
EP
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Superconductive magneto-resistive device
Assignee: Sharp Corp
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Filing: 1988-12-23
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Granted: —
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Expires: 2008-12-23
Abstract
Abstract A superconductive magneto-resistive device for use in a sensor system for sensing an external magnetic field which is formed so as to have a predetermined pattern for a current path through which a supplied current flows. The pattern includes portions formed close and paralell to each other so that magnetic fields induced by respective currents flowing through the portions can be cancelled with each other.
Inventors
- 👤 Shoei Kataoka
- 👤 Hideo Nojima
- 👤 Shuhei Tsuchimoto
- 👤 Ryusuke Kita
- 👤 Susumu Saitoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 23:11
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/035; G01R33/0352; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/842; Y10S505/843; Y10S505/845
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
128 words
A superconductive magneto-resistive device for use in a sensor system for sensing an external magnetic field wherein a current is supplied to said device while keeping it at a temperature close to the critical temperature of the superconductive material forming it and, when an external magnetic field is applied thereto, the change in the resistance thereof caused by the applied magnetic field is detected in order to measure the applied magnetic field being characterized in: that said device is formed so as to have a predetermined pattern for a current path through which the supplied current flows; and that said pattern includes portions formed close and parallel to each other so that magnetic fields induced by respective currents flowing through said portions can be cancelled with each other.
Claim 2
Dependent Claim
128 words
A superconductive magneto-resistive device for use in a sensor system for sensing an external magnetic field wherein a current is supplied to said device while keeping it at a temperature close to the critical temperature of the superconductive material forming it and, when an external magnetic field is applied thereto, the change in the resistance thereof caused by the applied magnetic field is detected in order to measure the applied magnetic field being characterized in: that said device is formed so as to have a predetermined pattern for a current path through which the supplied current flows; and that said pattern includes portions formed close and parallel to each other so that magnetic fields induced by respective currents flowing through said portions can be cancelled with each other.
Claim 3
Dependent Claim
18 words
A superconductive magneto-resistive device as claimed in claim 1, in which said pattern is formed on a plane.
Claim 4
Dependent Claim
20 words
A superconductive magneto-resistive device as claimed in claim 2, in which said pattern is formed on a substrate by deposition.
Claim 5
Dependent Claim
25 words
A superconductive magneto-resistive device as claimed in claim 1, in which said pattern is formed by a layered structure when seen in the cross-section thereof.
Claim 6
Dependent Claim
74 words
A sensor system for sensing an external magnetic field comprising plural superconductive magneto-resistive devices, supply means for supplying a constant current to each of said devices, means for cooling said devices at a temperature close to the critical temperature of a superconductive material forming each device, detection means for detecting a change in the resistance of each device being characterized in that said plural devices are arranged so as to form a predetermined pattern.
Claim 7
Dependent Claim
74 words
A sensor system for sensing an external magnetic field comprising plural superconductive magneto-resistive devices, supply means for supplying a constant current to each of said devices, means for cooling said devices at a temperature close to the critical temperature of a superconductive material forming each device, detection means for detecting a change in the resistance of each device being characterized in that said plural devices are arranged so as to form a predetermined pattern.
Claim 8
Dependent Claim
18 words
A sensor system as claimed in claim 5, in which said pattern is comprised of a one-dimensional array.
Claim 9
Dependent Claim
18 words
A sensor system as claimed in claim 5, in which said pattern is comprised of a two-dimensional array.
Claim 10
Dependent Claim
30 words
A sensor system as claimed in claim 5, in which said pattern is comprised of a matrix pattern formed with plural column and row linear elements orthogonal with each other.
Claim 11
Dependent Claim
18 words
A sensor system as claimed in claim 5, in which said pattern is comprised of a three-dimensional array.
Claim 12
Dependent Claim
76 words
A superconductive magneto-resistive device for an apparatus for sensing an external magnetic field by detecting the change in resistance of a current-carrying superconductive element maintained substantially at its critical temperature, the device including said superconductive element which comprises at least one pair of linear portions extending along side one another and arranged to carry current in respective opposite directions thereby to provide a cancelling of the induced magnetic fields due to said current in said portions.
Claim 13
Dependent Claim
76 words
A superconductive magneto-resistive device for an apparatus for sensing an external magnetic field by detecting the change in resistance of a current-carrying superconductive element maintained substantially at its critical temperature, the device including said superconductive element which comprises at least one pair of linear portions extending along side one another and arranged to carry current in respective opposite directions thereby to provide a cancelling of the induced magnetic fields due to said current in said portions.
Claim 14
Dependent Claim
56 words
A superconductive magneto-resistive device for an apparatus for sensing an external magnetic field characterized in that the device comprises an array of sensors comprising respective superconductive magneto-resistive elements in which the change of resistance due to the external field can be individually detected while the device is maintained substantially at the critical temperature of said elements.
Claim 15
Dependent Claim
56 words
A superconductive magneto-resistive device for an apparatus for sensing an external magnetic field characterized in that the device comprises an array of sensors comprising respective superconductive magneto-resistive elements in which the change of resistance due to the external field can be individually detected while the device is maintained substantially at the critical temperature of said elements.
References Cited (Backward Citations)
No citation records indexed.
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