Electromagnetic harmonic radiation disturbance processing method and apparatus
A radiation disturbance and processing device technology, applied in the field of radiation disturbance, can solve problems such as reducing harmonics, electromagnetic leakage, and reducing useful signal levels, so as to achieve the effect of avoiding interference and reducing harmonic radiation
Active Publication Date: 2016-01-06
湖州帷幄知识产权运营有限公司
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Problems solved by technology
[0004] One method is a shielding cover, but this method not only needs to use other methods or equipment to determine the interference source of electromagnetic harmonics, but also needs to determine the interference source, using a shielding cover is costly and is not conducive to standardized processing and assembly procedures Complex post-maintenance is difficult, and some high magnetic harmonics cannot be completely shielded, and there is electromagnetic leakage;
[0005] Another way for RC circuit such as figure 1 As shown, the main disadvantage is that while reducing the harmonic level to a certain value, it also reduces the level of the useful signal. In addition, even if the harmonic amplitude is reduced, there will be electromagnetic leakage, and sometimes it will affect the communication interface. Signal integrity and product consistency.
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[0025] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings, but these embodiments do not limit the present invention, those of ordinary skill in the art make structural, method, or functional changes based on these embodiments All are included in the scope of protection of the present invention.
[0026] figure 2 It is a schematic diagram of a circuit for dealing with electromagnetic harmonic radiation disturbance disclosed by the present invention. in,
[0027] Chip 1 is the main control chip in the communication system, and chip 2 is the controlled chip. During the communication process, the clock frequency of chip 1 and chip 2 is f. Since the clock system includes a phase-locked loop (PLL), etc., high-order harmonics are generated, that is, the n-fold frequency of the fundamental frequency signal, such as f=125MHZ, high-order harmonics nf=500MHZ, 750MHZ, etc., and the harmonics will beco...
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The invention provides an electromagnetic harmonic radiation disturbance processing method and apparatus. The processing method comprises the steps of detecting higher harmonic generated in running of electronic equipment, and regulating the resonant frequency of a harmonic probe into higher harmonic frequency; amplifying the harmonic generated by the harmonic probe to generate alternating current voltage; performing frequency discrimination on the alternating current voltage to output first direct current voltage and second direct current voltage; performing voltage comparison on the second direct current voltage to generate first binary voltage and second binary voltage; and controlling an electronic switch in a harmonic filter through the first binary voltage and the second binary voltage for performing rough adjustment on the resonant frequency, controlling the capacity of a variable capacitance diode in the harmonic filter through the first direct current voltage for performing fine adjustment on the resonant frequency to enable the resonant frequency to be equal to the higher harmonic frequency. The electromagnetic harmonic radiation disturbance processing method and apparatus can reduce the harmonic radiation of electronic products, and avoid interferences of the electromagnetic radiation on the surrounding equipment.
Description
technical field [0001] The invention relates to the technical field of radiation disturbance, in particular to a method and device for processing electromagnetic harmonic radiation disturbance. Background technique [0002] Radiation disturbance mainly refers to the phenomenon that energy is emitted from the source to space in the form of electromagnetic waves, or energy propagates in space in the form of electromagnetic waves. During the working process of electronic equipment, the high-order harmonics generated by various clock signals are emitted from the source to space in the form of electromagnetic waves, resulting in radiation disturbance. Excessive radiation disturbance may cause performance degradation of surrounding devices, equipment or systems, and interfere with information technology equipment or The normal work of other electronic products will cause certain harm to the human body. Therefore, radiation disturbance is an important part of electromagnetic compa...
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IPC IPC(8): H02M1/44
Inventor 文君
Owner 湖州帷幄知识产权运营有限公司