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LOW RADIATION NOISE ELECTRONIC EQUIPMENT, TRANSMISSION LINE CONNECTION CABLE WITH PLUG OR ADAPTER, AND RADIATION NOISE REMOVAL METHOD OF ELECTRONIC EQUIPMENT
LOW RADIATION NOISE ELECTRONIC EQUIPMENT, TRANSMISSION LINE CONNECTION CABLE WITH PLUG OR ADAPTER, AND RADIATION NOISE REMOVAL METHOD OF ELECTRONIC EQUIPMENT
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机译:低辐射噪声电子设备,带有插头或适配器的传输线连接电缆以及电子设备的辐射噪声消除方法
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摘要
PROBLEM TO BE SOLVED: To realize by using a common mode choke coil a real clean electromagnetic environment which substantively reduces noise radiating from electronic equipment, and which does not rely on a reduction of a noise measured value by clock frequency diffusion.;SOLUTION: The noise reduction electronic equipment of the present invention has an electronic equipment body with a signal generator shielded by a shield case, a port for taking out a signal outside through the shield case, and a common mode choke coil for preventing radiated noise connected to a transmission line connecting the signal generator and the port. The common mode choke coil is arranged inside or outside of a shield surface of each port on a substrate situated within a 1/4 wavelength of a signal frequency from the shield surface or within a connector. A common mode impedance of the common mode choke coil is set equal to or more than 377 Ω, so that a radiated noise is reduced. Thus, the noise reduction electronic equipment is realized.;COPYRIGHT: (C)2009,JPO&INPIT
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