Module for separating different-mode signal and common-mode signal

A differential-mode signal and common-mode signal technology, applied in the field of electromagnetic compatibility testing, can solve problems such as authenticity to be examined, and achieve accurate test results, good common-mode rejection ratio and differential-mode rejection ratio, and small size.

Inactive Publication Date: 2014-08-06
北京泰派斯特科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the authenticity of the performance data disclosed by Emcis remains to be examined

Method used

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  • Module for separating different-mode signal and common-mode signal
  • Module for separating different-mode signal and common-mode signal
  • Module for separating different-mode signal and common-mode signal

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Embodiment Construction

[0043] Such as image 3 As shown, the present invention is a module for separating differential mode signals and common mode signals. The module 1 includes a first transmission line transformer (T1) 2, which stabilizes one end of the primary coil of the first transmission line transformer (T1) 2 and the line impedance Connect the live wire output terminal 3 of the network, connect the other end of the primary coil of the first transmission line transformer to the neutral output terminal 4 of the line impedance stabilization network, between the neutral output terminal 4 and the live wire output terminal 3 The primary coil of the first transmission line transformer (T1) is connected with a tap 5 in the middle of the primary coil, the center tap 5 is connected to the common mode signal output terminal 7, the center tap 5 is grounded through the first resistor 6, and the live wire output terminal 3 is connected to the One end of the second transmission line transformer (T2) 8 inp...

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Abstract

The invention relates to a module for separating a different-mode signal and a common-mode signal. The module comprises a first transmission-line transformer. The two ends of a first transmission-line transformer primary coil are connected with the firing line output terminal and the null line output terminal of a line impedance stabilizing network respectively, the first transmission-line transformer primary coil is connected between the firing line output terminal and the null line output terminal, a center tap is arranged in the middle of the primary coil, the center tap is grounded through a first resistor, the center cap is connected with a common-mode signal output terminal, the firing line output terminal is further connected with one end of the input end of a second transmission-line transformer, the corresponding output end of the second transmission-line transformer is connected with a different-mode signal output terminal through a second resistor, the null line output terminal is further connected with the other end of the input end of the second transmission-line transformer, and the corresponding output end the second transmission-line transformer is grounded. The module has the advantages of being simple in circuit structure, good in common-mode rejection ratio and different-mode rejection ratio, precise in test effect, small in size, light in weight and the like.

Description

technical field [0001] The invention relates to the technical field of electromagnetic compatibility detection, in particular to a module for separating differential mode signals and common mode signals. Background technique [0002] In the existing technology, according to the propagation path of the conducted interference emitted by the equipment under test, it can be decomposed into two components of common mode and differential mode, such as figure 1 As shown: LISN is the line impedance stabilization network 12 (also known as artificial power supply network), which is a necessary equipment for testing conducted emissions. It provides a test environment of approximately 50Ω for test equipment (spectrum analyzer, receiver) Isolate the useless radio frequency signal from the power grid and avoid the power grid directly burning the test instrument, (GB6113-85), the right side is used to connect with the electromagnetic interference source 15 to be tested. [0003] According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 区健昌冯桂山白宇坤孙晋栋
Owner 北京泰派斯特科技发展有限公司
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