A Design Method for Electromagnetic Compatibility of Circuit Modules Based on Crystal Oscillator Spectrum

Abstract

The present invention relates to a circuit module electromagnetic compatibility design method based on crystal oscillator frequency spectrum. The circuit module electromagnetic compatibility design method comprises the following steps of (1) determining output frequency spectrum and relevant parameters of a crystal oscillator selected by a circuit; (2) determining and verifying an interference source by testing a circuit module power plane output signal; (3) determining a coupling path of interference signals of the crystal oscillator; and (4) performing electromagnetic compatibility improved design. Starting with crystal oscillator frequency spectrum characteristics, the generic technology of the circuit module electromagnetic compatibility design is researched, and the electromagnetic compatibility key problem is solved. The purpose of the present invention is to provide a general technology means for the electromagnetic compatibility design of a modular circuit through electromagnetic compatibility design and analysis summary of a frequency source module, reliability of modular circuit design is increased when electromagnetic compatibility design efficiency is improved, and the circuit module electromagnetic compatibility design method is advantaged by universality and low cost.

Description

technical field [0001] The invention relates to an electromagnetic compatibility design method of a circuit module, more particularly, an electromagnetic compatibility design method of a circuit module based on a crystal oscillator output spectrum. It belongs to the field of electromagnetic compatibility. Background technique [0002] From the perspective of electromagnetic energy propagation, the electromagnetic compatibility problem can be divided into three components, namely interference sources, coupling channels, and sensitive equipment. Although the electromagnetic compatibility problem can be divided into three parts, due to the complex electronic equipment and system components, it is difficult to sort out the types of interference sources one by one, and the coupling forms of electromagnetic energy are various and other objective facts, it is difficult to truly achieve Comprehensive analysis leads to difficulties in EMC design. The traditional electromagnetic com...

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Problems solved by technology

Although the electromagnetic compatibility problem can be divided into three parts, due to the complex electronic equipment and system components, it is difficult to sort out the types of interference sources one by one, and the coupling forms of electromagnetic energy are various and other objective facts. Comprehensive analysis leads to difficulties in EMC design

The traditional electromagnetic compatibility analysis and design methods require rich engineering experience and a good understanding of the equipment circuit structure, which puts forward higher requirements for engineers; at the same time, it often takes a lot of time to find the source of electromagnetic interference. Large manpower and material resources take a long time, thus prolonging the design cycle and increasing the project cost

These factors have caused the traditional EMC analysis and design method to have great limitations, and the solutions to different EMC problems have poor portability

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