Magnetic-field-measuring device

A technology for measuring equipment and magnetic fields, which is applied in the direction of using electromagnetic devices for magnetic field measurement, measurement of electricity, measurement devices, etc., and can solve problems such as expensive equipment

Inactive Publication Date: 2006-12-13
CENT NAT DETUD SPATIALES C N E S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Those are also very expensive due to the presence of spectrum analyzers and synchronous detectors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The device shown in Figure 1 is used to analyze the circuit at work.

[0026] The device basically includes a support plate 12 for the integrated circuit C, a circuit 14 for exciting the integrated circuit at a predetermined frequency FC, a device 16 for analyzing the magnetic field generated by the circuit C during operation, and a device for performing magnetic field analysis The device 18 is the result obtained at the output of the device 16. The device further comprises means 20 for observing the integrated circuit during operation. Those devices are known per se, so detailed descriptions are omitted.

[0027] The bracket 12 on which the circuit C is placed is composed of a mu metal plate, or includes a mu metal plate at its lower part away from the circuit, which forms a barrier to the magnetic field. Advantageously, circuit C is confined in a nickel-iron high-permeability alloy box.

[0028] The excitation circuit 14 is formed by, for example, a frequency generator, w...

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PUM

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Abstract

The invention relates to a device (16) which is used to measure at least one component of a magnetic field. The inventive device comprises a magnetoresistive sensor (102) and a measuring chain (28). According to the invention, the input of the aforementioned measuring chain is connected to the magnetoresistive sensor (102), while the output thereof is intended to supply information that is representative of the magnetic field in the region of the sensor. In addition, the measuring chain (28) comprises means (136) for isolating a frequency component of the signal from the sensor representative of the magnetic field for a unique pre-determined frequency (FI).

Description

Technical field [0001] The invention relates to a device for measuring a magnetic field. This type of device includes a magnetoresistance or magnetoconductance sensor and a measuring chain. Its input end is connected to the magnetoresistance or magnetoconductance sensor, and its output end can provide a representative sensor area Information about the magnetic field inside. Background technique [0002] In order to control the integrated circuit or to measure the radiation generated by the circuit during operation, it is known to arrange one or more sensors above the circuit to determine the magnetic field or electric field generated by the circuit operation. In order to detect magnetic fields, these devices use antennas or "SQUIDS", or superconducting quantum interference devices. [0003] Recently, it has been conceived to use a magnetoresistive sensor, and more precisely, a GMR type sensor (Giant Magnetoresistive Sensor) measures the magnetic field generated by the circuit dur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R33/09G01R31/302G01R33/02G01R33/06
CPCG01R31/002G01R33/02G01R33/09
Inventor 罗迈因·德斯朴拉特斯奥利弗·卡里普尔菲利克斯·博杜安菲利普·佩尔都
Owner CENT NAT DETUD SPATIALES C N E S
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