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1. (EP2165206) METHOD FOR LOW FREQUENCY NOISE CANCELLATION IN MAGNETO-RESISTIVE MIXED SENSORS

Office : European Patent Office
Application Number: 07825331 Application Date: 27.06.2007
Publication Number: 2165206 Publication Date: 24.03.2010
Publication Kind : B1
Designated States: AL,AT,BA,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,HR,HU,IE,IS,IT,LI,LT,LU,LV,MC,MK,MT,NL,PL,PT,RO,RS,SE,SI,SK,TR
Prior PCT appl.: Application Number:IB2007003021 ; Publication Number: Click to see the data
IPC:
G01R 15/20
G01D 5/14
G01R 33/035
G11B 5/39
H01L 43/08
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
15
Details of measuring arrangements of the types provided for in groups G01R17/-G01R29/, G01R33/-G01R33/26176
14
Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
20
using galvano-magnetic devices, e.g. Hall-effect devices
G PHYSICS
01
MEASURING; TESTING
D
MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; TRANSFERRING OR TRANSDUCING ARRANGEMENTS NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5
Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
12
using electric or magnetic means
14
influencing the magnitude of a current or voltage
G PHYSICS
01
MEASURING; TESTING
R
MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33
Arrangements or instruments for measuring magnetic variables
02
Measuring direction or magnitude of magnetic fields or magnetic flux
035
using superconductive devices
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127
Structure or manufacture of heads, e.g. inductive
33
Structure or manufacture of flux-sensitive heads
39
using magneto-resistive devices
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
L
SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
43
Devices using galvano-magnetic or similar magnetic effects; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof
08
Magnetic-field-controlled resistors
CPC:
G01R 33/093
B82Y 25/00
G01R 33/035
G01R 33/0354
G01R 33/0358
Applicants: COMMISSARIAT ENERGIE ATOMIQUE
Inventors: FERMON CLAUDE
POLOVY HEDWIGE
PANNETIER-LECOEUR MYRIAM
Priority Data: 2007003021 27.06.2007 IB
Title: (DE) VERFAHREN ZUR NIEDERFREQUENZ-RAUSCHUNTERDRÜCKUNG IN MAGNETORESISTIVEN MISCHSENSOREN
(EN) METHOD FOR LOW FREQUENCY NOISE CANCELLATION IN MAGNETO-RESISTIVE MIXED SENSORS
(FR) PROCÉDÉ POUR L'ANNULATION DE BRUIT BASSE FRÉQUENCE DANS DES CAPTEURS MIXTES MAGNÉTORÉSISTIFS
Abstract: front page image
(EN) The method for cancellation of low frequency noise in a magneto-resistive mixed sensor (1) comprising at least a superconducting loop with at least one constriction and at least one magneto-resistive element (6) comprises a set of measuring steps with at least one measuring step being conducted with the normal running of the mixed sensor and at least another measuring step being conducted whilst an additional super-current is temporarily injected in the at least one constriction of the at least one superconducting loop of the mixed sensor (1) up to a critical super-current of the constriction so that the result of the at least another measuring step is used as a reference level of the at least one magneto-resistive element (6).
(FR) La présente invention concerne un procédé pour l'annulation d'un bruit basse fréquence dans un capteur mixte magnétorésitif (1) comprenant au moins une boucle supraconductrice avec au moins une constriction et au moins un élément magnétorésitif (6). Le procédé comprend un ensemble d'étapes de mesure, au moins une étape de mesure étant conduite en fonctionnement normal du capteur mixte et au moins une autre étape de mesure étant conduite alors qu'un supracourant supplémentaire est temporairement injecté dans la ou les constrictions de la ou des boucles supraconductrices du capteur mixte (1) jusqu'à un supracourant critique de la constriction de telle sorte que le résultat de la ou des autres étapes de mesure est utilisé en tant que niveau de référence du ou des éléments magnétorésistifs (6).
Also published as:
JP2010532471US20100173783WO/2009/001160