JPH05334394

PURPOSE:To select the noise filter at a design stage of CAD level by retrieving a table on the basis of a frequency band as a key and selecting the noise filter which suppresses the electromagnetic radiation noise from an electric conductor. CONSTITUTION:In a step 11, the upper limit of the permissi...

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Bibliographic Details
Main Author FUKUMOTO YUKIHIRO
Format Patent
LanguageEnglish
Published 17.12.1993
Edition5
Subjects
CALCULATING
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
PHYSICS
PRINTED CIRCUITS
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Summary:PURPOSE:To select the noise filter at a design stage of CAD level by retrieving a table on the basis of a frequency band as a key and selecting the noise filter which suppresses the electromagnetic radiation noise from an electric conductor. CONSTITUTION:In a step 11, the upper limit of the permissible quantity of the electromagnetic radiation noise is inputted in the form of a frequency range and in a step 12, a signal waveform on the electric conductor is calculated from electric conductor information on CAD, the input signal obtained from a device model on CAD, and a terminal model. In a step 13, the quantity of an electromagnetic radiation noise radiated from the electric conductor is estimated in the frequency range from the calculated current value of a signal and electric conductor information on, for example, the loop area of the electric conductor. In a step 14, a table is referred to on the basis of the frequency band, wherein the previously estimated electromagnetic radiation noise quantity exceeds the permissible quantity inputted in the step 11, as a key to select the noise filter which provides effect.
Bibliography:Application Number: JP19920144078