Controllable magneto-dependent resistor
A technology of resistors and resistors, which is applied in the direction of magnetic field-controlled resistors, circuits, electrical components, etc., can solve the problems of low precision, unguaranteed adjustment speed, and inability to meet continuous adjustment of resistance values, etc.
Inactive Publication Date: 2020-05-05
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
For the adjustment and control of the resistance value, the existing methods can be briefly divided into the following types: one is to obtain the required resistance value through the digital potentiometer, but this method gives discrete values, which can only be given normally. There are some discrete resistance values, which cannot meet the needs of continuous adjustment of resistance values.
[0004] The other is to obtain the required resistance value by sliding rheostat or rotating potentiometer. Although this method can realize continuous stepless adjustment of resistance in theory, the sliding contact must be manually changed to obtain the corresponding resistance value. The position is realized, the operation is inconvenient and the precision is not high, the adjustment speed cannot be guaranteed, and it is also difficult to realize the resistance value adjustment through the automatic control method
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Embodiment Construction
[0021] The present invention will be further described below in conjunction with the accompanying drawings.
[0022] see figure 1 In the first embodiment, a C-shaped iron core 6 and a coil 5 wound on it are described, and the two ends of the coil 5 have interfaces 1 and 2 for accessing an external voltage or current source, the iron core 6, the coil 5 and the external interfaces 1 and 2 form a magnetic field generating part. At the opening of the C-shaped iron core, an insulating substrate 8 is placed, on which a magnetically sensitive conductive layer 7 is placed. The magnetically sensitive conductive layer 7 is in the shape of a sheet and has interfaces 3 and 4 connected to the outside. The insulating substrate 8, the magnetically sensitive conductive layer 7 and the interfaces 3 and 4 form a resistance part, which is located in the magnetic field in the middle of the C-shaped opening of the C-shaped iron core 6, and the resistance part and the magnetic field generating par...
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The invention relates to a variable resistor, and in particular relates to a variable resistor controlled by external voltage. The resistor is characterized in that the resistor comprises a magnetic field generating part and a resistor part; the magnetic field generating part comprises an iron core (6) and an electromagnetic coil (5) wound on the iron core (6) to generate a magnetic field; the electromagnetic coil comprises external voltage control interfaces (1 and 2); the resistor part comprises a magneto-sensitive material conducting layer (7), an insulating substrate (8) and resistance output interfaces (3 and 4); and the magneto-sensitive material conducting layer (7) is an S-shaped monofilament conductor.
Description
technical field [0001] The invention relates to a variable resistor, in particular to a variable resistor controlled by an external voltage. Background technique [0002] A magnetoresistor is a resistive element that is sensitive to magnetism and has a magnetoresistance effect. Magnetoresistors are usually made of magnetically sensitive semiconductor materials such as indium antimonide (InSb) or indium arsenide (InAs). When the direction or strength of the applied magnetic field changes, the resistance value of the magneto-sensitive resistor can be changed accordingly. [0003] In many engineering practices, variable resistors are needed to fine-tune the system or match a certain mode. For the adjustment and control of the resistance value, the existing methods can be briefly divided into the following types: one is to obtain the required resistance value through the digital potentiometer, but this method gives discrete values, which can only be given normally. There are ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01L43/08H01L43/02H01F3/06
CPCH01F3/06H10N50/80H10N50/10
Inventor 于南翔朱伟王罗于长安
Owner CHONGQING UNIV OF POSTS & TELECOMM