Method for suppressing electromagnetic wave radiation on printed circuit board

A technology of printed circuit boards and electromagnetic waves, applied in printed circuit components, electrical components, magnetic field/electric field shielding, etc., can solve the problem of DDR strobe interference cannot be effectively suppressed, the definition of layer space is narrow, and it is not suitable, etc. problem, achieve the effect of improving electromagnetic radiation problem, simple implementation, and increasing efficiency

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A technology of printed circuit boards and electromagnetic waves, applied in printed circuit components, electrical components, magnetic field/electric field shielding, etc., can solve the problem of DDR strobe interference cannot be effectively suppressed, the definition of layer space is narrow, and it is not suitable, etc. problem, achieve the effect of improving electromagnetic radiation problem, simple implementation, and increasing efficiency

CN101754664AInactive Publication Date: 2010-06-23MSI ELECTRONICS KUN SHAN

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[0026] In order to further explain the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation of the method for suppressing electromagnetic radiation on a printed circuit board proposed according to the present invention , method, step, feature and effect thereof, detailed description is as follows.

[0027] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Through the description of the specific implementation mode, a more in-depth and specific understanding of the technical means and effects adopted by the present invention to achieve the intended purpose can be obtained. However, the accompanying drawings are only for reference and description, an...

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Abstract

The invention relates to a method for suppressing electromagnetic wave radiation on a printed circuit board. Through grounding a plurality of positioning points around a double-speed memory slot on the printed circuit board, the grounding efficiency of the printed circuit board is directly improved, so the electromagnetic wave radiation is suppressed. Thereby, the invention has the advantages that the Data strobe electromagnetic interference of the DDR memory is effectively reduced, and the electromagnetic waves which are led out by EMC and do harm to human bodies are effectively suppressed.

Description

technical field [0001] The invention relates to a method for suppressing electromagnetic wave radiation, in particular to a method for suppressing electromagnetic wave radiation on a printed circuit board. Background technique [0002] The electromagnetic interference of the digital filter (Data strobe) of the double-speed (Double Data Rate, DDR) memory on the printed circuit board is a very common and difficult problem. During the Electromagnetic Compatibility (EMC) test, due to the high speed of the DDR memory The transmission of frequent signals produces strong electromagnetic wave radiation in the high-frequency region near 1GHz. Especially in the era of Vista, the requirements for the speed and capacity of DDR memory are higher, which also highlights the seriousness of this problem. Now the problem of shielding DDR strobe radiation is nothing more than adjusting the capacitance value around the relevant memory and paying attention to the layout of the layout to avoid i...

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Application Information

Patent Timeline

23 Jun 2010

Publication

CN101754664A

IPC: H05K9/00; H05K1/02; G06F1/18

Inventors: 何志刚