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Active crystal oscillator wire arrangement method for reducing EMI risk

A wiring method and crystal oscillator technology, applied in special data processing applications, instruments, electrical digital data processing, etc., to improve system performance, reduce interference, and reduce EMI risks

Inactive Publication Date: 2015-04-29
LANGCHAO ELECTRONIC INFORMATION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the crystal oscillator circuit will have a capacitor filter

Method used

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  • Active crystal oscillator wire arrangement method for reducing EMI risk

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Embodiment Construction

[0015] Below according to accompanying drawing of description, in conjunction with specific embodiment, the present invention is further described:

[0016] An active crystal oscillator wiring method that reduces EMI risk. By connecting the GND of the crystal oscillator and its peripheral components together, and forming a loop to wrap the crystal oscillator, peripheral components and signals, the EMI risk of the crystal oscillator can be effectively reduced.

[0017] Such as figure 1 As shown, taking the crystal oscillator circuit on the sas backplane as an example, the power input end is equipped with a filter circuit, and the circuit output form is an LVECL structure. At the end of the signal line, there is a bias circuit and a terminal matching circuit. By connecting the crystal oscillator and its peripheral The GNDs of the component circuits are all connected together and form a loop to wrap the crystal oscillator and peripheral components and signals, which can effective...

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Abstract

The invention discloses an active crystal oscillator wire arrangement method for reducing EMI risk. A crystal oscillator and the GND of a peripheral element circuit of the crystal oscillator are both connected together, and a loop is formed to wrap the crystal oscillator, the peripheral element circuit and signals so that the EMI risk of the crystal oscillator can be effectively reduced. By means of the active crystal oscillator wire arrangement method, a crystal oscillator module and other signals can be relatively isolated, the interference of the crystal oscillator to the outside can be effectively reduced, the EMI risk of a system can be reduced to the greatest extent, and the performance of the system can be improved.

Description

technical field [0001] The invention relates to the field of electromagnetic compatibility design, in particular to an active crystal oscillator wiring method for reducing EMI risk. Background technique [0002] EMI stands for Electromagnetic Interference. Electromagnetic interference is divided into conducted electromagnetic interference (Conducted EMI) and radiated electromagnetic interference (Radiated EMI). Among them, conducted electromagnetic interference noise propagates between live wire, neutral wire and ground wire, including common-mode noise (Common-mode Noise) between live wire and ground wire, neutral wire and ground wire, and differential-mode noise (Differential-mode Noise) between live wire and neutral wire. mode Noise). Radiated electromagnetic interference noise propagates in space in the form of radiated electromagnetic fields, including common-mode noise caused by poor grounding or non-zero ground reflection potentials, and differential-mode noise caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 吴修权李永翠
Owner LANGCHAO ELECTRONIC INFORMATION IND CO LTD