Z U K E N R E D A C ZUKEN-REDAC TECHNIQUES DE MODELISATION POUR LES COMPOSANTS ACTIFS E. Leroux, R. Ene F. Maggioni CEM COMPO 99 - TOULOUSE - 14, 15 Janvier 1999

Z U K E N R E D A C ZUKEN-REDAC INDEX INTRODUCTION DISPERSION OF ELECTRICAL PARAMETERS OF COMPONENTS A MODELLING METHOD BASED ON TDR A MORE COMPLETE MODEL CONCLUSION, A METHODOLOGY IS PROPOSED

Z U K E N R E D A C ZUKEN-REDAC INTRODUCTION In EMC simulation of Printed Circuit Boards Need of realistic models for components You have: SPICE, IBIS But: Components suffer from dispersion of their electrical parameters Solution: A modelling methodology well adapted to EMC & high speed designs

Z U K E N R E D A C ZUKEN-REDAC DISPERSION OF ELECTRICAL PARAMETERS OF COMPONENTS Unloaded output voltage Rise & fall times Clamping diodes Input threshold Input or output capacitances

Z U K E N R E D A C ZUKEN-REDAC A MODELLING METHOD BASED ON TDR: description

Z U K E N R E D A C ZUKEN-REDAC A MODELLING METHOD BASED ON TDR: CMOS input

Z U K E N R E D A C ZUKEN-REDAC A MODELLING METHOD BASED ON TDR: CMOS input

Z U K E N R E D A C ZUKEN-REDAC A MODELLING METHOD BASED ON TDR: CMOS output

Z U K E N R E D A C ZUKEN-REDAC FREQ[GHz] dBV IBIS-like model Enhanced model measured Validity limit for IBIS-like model Validity limit for Enhanced model Comparison between an IBIS-like and an enhanced model

Z U K E N R E D A C ZUKEN-REDAC A MORE COMPLETE MODEL

Z U K E N R E D A C ZUKEN-REDAC Example of special component model AC02 (four NOR): gnd vcc standard receiver model R 1V 0V Delay Single NOR model Four NOR models A B OUT standard driver model pin crosstalk model.. timing/logic core

Z U K E N R E D A C ZUKEN-REDAC CONCLUSION & PROPOSAL FOR AN INDUSTRIAL USE OF THE METHODOLOGY A modelling method permits to avoid the dispersion of certain electrical parameters of components and can be used by all HDT tools and THRIS environnement But it can not be applied to all components placed on an industrial board Solution: a methodology that use standard library, SPICE or IBIS models for most of components on the board build enhanced models (improving existing IBIS models for example) for critical components using Models provider (HDT for example)