Superconducting quantum interference sensor and applicable magnetic detector
A technology of superconducting quantum interference and magnetic detectors, which is applied in the direction of magnetic field measurement and the size/direction of the magnetic field using superconducting devices, which can solve the problems of low integration and suppression sensitivity of superconducting quantum interference devices, and reduce electromagnetic interference. Effects of interference, reduction of line length, reduction of interference
Active Publication Date: 2017-03-01
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a superconducting quantum interference sensor and an applicable magnetic detector, which are used to solve the problem of low integration of superconducting quantum interference devices in the prior art, and amplifiers. The noise level suppresses issues such as the sensitivity of superconducting quantum interference magnetic detectors
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[0029] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0030] see Figure 1 to Figure 5 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered.
[0031] ...
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The invention provides a superconductive quantum interference sensor and a magnetic detector used for the same. According to the magnetic detector, a bias circuit can be used to provide a bias voltage for an amplifier of the superconductive quantum interference sensor. After voltage division by a voltage dividing resistor, the amplifier can be used to provide the bias voltage after voltage division for a superconductive quantum interference member of the superconductive quantum interference sensor, and at the same time, can be used for amplifying and outputting an electric signal output by the superconductive quantum interference member by using the bias voltage. The superconductive quantum interference sensor is still immersed in a container, so that the superconductive quantum interference member is in the superconductive state. Because the amplifier can be used to provide the bias voltage for the superconductive quantum interference member, the magnetic detector can be used to effectively solve the problems of the conventional bias circuit adopted by the conventional amplifier and the conventional superconductive quantum interference device such as low integration level and complicated circuit structure.
Description
technical field [0001] The invention relates to a superconducting quantum interference sensor and an applicable magnetic detector. Background technique [0002] The superconducting quantum interference magnetic detector is the most sensitive magnetic sensor known at present, and has important applications in the detection of weak magnetic signals, such as heart magnetism, brain magnetism, nuclear magnetic resonance, and geophysical detection. [0003] Superconducting quantum interference sensors include sensors with low-impedance devices. The output signal of the sensor is very weak, only tens of uV (microvolts), and it works in a superconducting low-temperature environment. Therefore, it is equipped with the sensor The bias voltage is very low. At the same time, in order to be able to perform subsequent processing on the electrical signal detected by the sensor, the superconducting quantum interference sensor also includes an amplifier, wherein the amplifier also needs a b...
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IPC IPC(8): G01R33/035
Inventor 王永良徐小峰张国峰孔祥燕谢晓明
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI