New PDF release: 19.Electromagnetic Compatibility

By John G. Webster (Editor)

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However, many governments have set preliminary rules for the protection of people. The rules are described in terms of the specific absorption rate (SAR), which is defined as the rate of absorption of energy per unit body weight per unit time. Figure 14 is an illustration of TELEPHONE INTERFERENCE 511 Z Whip antenna 83 12 fp 60 Figure 14. Interference to the human body. 125 Internal antenna reasonable time. Another is an experimental approach using a virtual body. The body is exposed to the radiation, and the intensity of the wave is measured by using a miniature probe in three dimensions.

L. Doob, Stochastic Processes, New York: Wiley, 1953. 18. E. Wong and B. Hajek, Stochastic Processes in Engineering Systems, New York: Springer-Verlag, 1985. GEOFFREY C. ORSAK Southern Methodist University NOISE, CIRCUIT. See CIRCUIT NOISE. htm ● HOME ● ABOUT US ● // CONTACT US ● HELP Wiley Encyclopedia of Electrical and Electronics Engineering Telephone Interference Standard Article Toshio Ishizaki1, Makoto Sakakura1, Toru Yamada1, Koichi Ogawa1 1Matsushita Electric Industrial Co. (Panasonic), Osaka, Japan Copyright © 1999 by John Wiley & Sons, Inc.

7(a) are canceled for the desired signal. So it becomes a virtual ground for the signal. According to this idea, these ground terminals can be removed without affecting the circuit functions. This new concept is shown in Fig. 7(b) as an earthless balanced configuration. It can solve the above problems, that is, imperfect shielding and poor grounding. Generally, the interference is superimposed on the two balanced terminals in phase. It is so-called common-mode noise. Commonmode noise can be rejected by differential operation.

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19.Electromagnetic Compatibility by John G. Webster (Editor)


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