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Low the electronic equipment itself which possesses the emission noise removal mannered null signal generation section of the emission noise electronic equipment,
Low the electronic equipment itself which possesses the emission noise removal mannered null signal generation section of the emission noise electronic equipment,
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机译:具有发射噪声电子设备的消除发射噪声的空信号产生部分的电子设备本身低,
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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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