Regulation and control method and system of tunneling magnetoresistance sensor

A technology of tunneling magnetoresistance and sensors, which is applied in the direction of instruments, measuring magnetic variables, measuring electric variables, etc., can solve the problems of increasing the complexity of the magnetic detection system, and achieve the effect of reducing the overall complexity

Active Publication Date: 2019-08-09
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, after the sensor is prepared, its sensitivity and range are fixed, and the compensation operation is generally performed through circuit parts such as operational amplifiers, which increases the overall complexity of the magnetic detection system

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  • Regulation and control method and system of tunneling magnetoresistance sensor
  • Regulation and control method and system of tunneling magnetoresistance sensor
  • Regulation and control method and system of tunneling magnetoresistance sensor

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Embodiment Construction

[0042] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0044] Secondly, the present invention is described in detail in combination with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the device structure will not be partially enlarged according to the gener...

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Abstract

The invention discloses a regulation and control method of a tunneling magnetoresistance sensor. The regulation and control method comprises the steps that a voltage is loaded between a bottom electrode and a top electrode of the tunneling magnetoresistance sensor, wherein the voltage is a variable voltage provided by an adjustable power supply; and the voltage value between the bottom electrode and the top electrode is adjusted to adjust and control the range and sensitivity of the tunneling magnetoresistance sensor. According to the regulation and control method, the voltage is loaded between the bottom electrode and the top electrode of the tunneling magnetoresistance sensor based on the adjustable power supply, and the coupling coefficient of the interface vertical anisotropy of the magnetic tunnel junction in the tunneling magnetoresistance sensor is changed by adjusting the applied voltage value; and through the coupling coefficient, the interface vertical anisotropy energy can be adjusted, and then the magnetic anisotropy energy of the magnetic tunnel junction is adjusted, so that the sensitivity and the linear region of the tunneling magnetoresistance sensor are correspondingly adjusted, no additional compensation circuit is needed, and the overall complexity of a magnetic detection system is reduced. Correspondingly, the invention further discloses a regulation and control system of the tunneling magnetoresistance sensor.

Description

technical field [0001] The present application relates to the field of semiconductors, in particular to a control method and system for a tunneling magnetoresistance sensor. Background technique [0002] Weak magnetic detection is an important part of modern detection technology in the 21st century. Weak magnetic detection technology is used in military affairs, resource exploration, space environment detection and other scientific research fields. The weak magnetic detection system is generally composed of a magnetic sensor, a signal conditioning module, a signal acquisition module and a signal analysis module. The function of the magnetic sensor is to convert the magnetic field signal into an electrical signal. The sensitivity of the magnetic sensor determines the detection accuracy of the overall system, and the saturation magnetic field of the magnetic sensor determines the detection range of the overall system. [0003] Generally speaking, for different magnetic field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01R33/09
CPCG01R33/098G01R35/005
Inventor 崔岩罗军杨美音许静
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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