Physical Interpretation of the IEMCAP Integrated EMI Margin

Abstract

The IEMCAP computes an in t e g r a t e d EMI margin ( I .M .) t h a t i s used in a s s e s s i n g e le c tr o m a g n e t ic c o m p a t ib i l i t y o f e l e c t r o n i c systems-*-. T h is paper t r e a t s th e s u b j e c t o f th e I.M. in some depth , d e s c r ib in g i t s p h y s i c a l meaning i n r e l a t i o n to r e a l hardware, how i t i s d e r iv e d from a sy stem m odel, and how i t i s used by th e EMC e n g in e e r . A method i s recommended fo r q u a n t i fy in g key param eters e n te r in g i n t o the I.M. com putation, based on hardware performance c h a r a c t e r i s t i c s and system d e s ig n c o n s id e r a t io n s such as n o i s e f i g u r e , s i g n a l t o n o i s e r a t io and s e n s i t i v i t y . To dem onstrate the p h y s ic a l meaning o f the I .M ., an experim ent i s d e sc r ib e d in which th e t h e o r e t i ­ c a l l y d e r iv e d I.M. can be c o r r e la t e d w ith measured d a ta .