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Multi-resonance LC circuit decoupling method

A multi-resonance and circuit technology, applied in the field of microelectronics, can solve the problem that the measurement of three or more parameters cannot be expanded, and achieve the effect of simple structure and simple decoupling

Active Publication Date: 2021-11-09
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is limited to two-parameter measurements and cannot be extended to three or more parameters

Method used

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  • Multi-resonance LC circuit decoupling method
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  • Multi-resonance LC circuit decoupling method

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Embodiment Construction

[0024] The present invention will be further explained below in conjunction with the accompanying drawings.

[0025] A kind of multi-resonant LC circuit decoupling method, multi-resonant LC circuit such as figure 1 shown, including four fixed inductors L 1 , L 2 , L 3 , L 4 , four sensing capacitors C W 、C X 、C Y 、C Z , and two fixed capacitors C 1 、C 2 , forming 4 parallel branches and 1 connecting branch. The first parallel branch is the inductor L 1 Series inductance L 2 , the second parallel branch is a fixed capacitor C 1 Series fixed capacitor C 2 , the third parallel branch is the sensitive capacitance C x , the fourth parallel branch is a constant inductance L 3 Series Sensitive Capacitor C z , the connecting branch is a fixed inductance L 4 and sensitive capacitance C w In parallel with the sensitive capacitor C y in series. One end of the first connection branch is connected to the first parallel branch L 1 and L 2 The common terminal, the other...

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Abstract

The invention discloses a multi-resonance LC circuit decoupling method. A multi-resonance LC circuit comprises four fixed inductors, four sensitive capacitors and two fixed capacitors. The ten circuit elements are spatially symmetrically distributed, two fixed capacitors are equal, and the inductor of the sensor coil is equal to the inductor of the symmetrical chip. The multi-resonant LC circuit has four resonant frequencies, and wireless readout is carried out through coupling of a readout coil and a sensor coil. The circuit has two working modes, the two modes are mutually independent, and two resonant frequencies are coupled in each mode, so that the decoupling problem among the four resonant frequencies is converted into decoupling between two resonant peaks in each mode, the values of the four sensitive capacitors can be solved, and the decoupling process is greatly simplified. The method can be used for passive and wireless multi-parameter reading.

Description

technical field [0001] The invention relates to a decoupling method for a multi-resonance LC circuit, which belongs to the technical field of microelectronics. Background technique [0002] With the vigorous development of the Internet of Things and sensor networks, the trend of integration and miniaturization of smart devices has put forward more new requirements for the design of sensor nodes. In the practical application of wireless sensor networks, it is often necessary to integrate multiple sensitive units in a single sensor node, so as to realize the simultaneous measurement of multiple target parameters. For example, in the field of food and drug packaging monitoring, multiple parameters such as internal temperature, humidity, pressure, and pH value need to be detected simultaneously in order to achieve the best management effect. [0003] Only measuring the resonant frequency as a parameter to calibrate the sensor is one of the main reasons that hinder the developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/367G01D21/02
CPCG06F30/367G01D21/02
Inventor 王立峰张驰董蕾黄庆安
Owner SOUTHEAST UNIV
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