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Sensors 2006, 6(3), 90-99; doi:10.3390/s6030090

An EMI Filter Selection Method Based on Spectrum of Digital Periodic Signal

1
Ministry of Defence, Administration for Civil Protection and Disaster Relief, Vojkova cesta 61, 1000 Ljubljana, Slovenia
2
University of Maribor, Faculty of Electrical Engineering and Computer Science, Smetanova ulica 17, 2000 Maribor, Slovenia
3
ISKRAEMECO d.d, Research and Development Department, Savska loka 4, 4000 Kranj, Slovenia
*
Author to whom correspondence should be addressed.
Received: 20 January 2006 / Accepted: 2 March 2006 / Published: 3 March 2006
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Abstract

This paper describes a new method for the selection of an appropriate signal lineElectromagnetic Interference (EMI) filter. To date, EMI filter selection has been based onthe measurement of the radiation of the entire device. The new selection method based onthe signal’s Fast Fourier Transform (FFT) measurement has proved to be efficient. The EMIfilter is optimized separately for each line. The method described in this paper involving aCentral Processor Unit (CPU) module demonstrates that the proposed FFT-based selectionmethod is better than the radiation-based one. The radiation level in the frequency range 30MHz to 1 GHz is lower for approximate 2 – 6 dBμV/m.
Keywords: EMC; EMI filter; electrically long trace; typical frequency; sensor. EMC; EMI filter; electrically long trace; typical frequency; sensor.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Podbersic, M.; Matko, V.; Segula, M. An EMI Filter Selection Method Based on Spectrum of Digital Periodic Signal. Sensors 2006, 6, 90-99.

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