EMC Corporation

IBIS SUMMIT 10/15/98

IBIS Case Studies:Comparison of Simulations

Fabrizio Zanella, EMC Corporation

EMC Corporation

IBIS SUMMIT 10/15/98

Objectives

• Compare SI Tools using IBIS models

• Compare to empirical measurements and SPICE simulations

• All measurements and simulations performed on SI test boards created at EMC

EMC Corporation

IBIS SUMMIT 10/15/98

IBIS Model Case Studies

• Case 1: TTL signals: empirical,SPICE, IBIS

• Case 2: SRAM signals: empirical,SPICE, IBIS

• Case 3: IBIS model comparison

EMC Corporation

IBIS SUMMIT 10/15/98

Case 1: Lab measurement

EMC Corporation

IBIS SUMMIT 10/15/98

Case 1: SPICE

EMC Corporation

IBIS SUMMIT 10/15/98

Case 1: Simulators A,B (IBIS models)

EMC Corporation

IBIS SUMMIT 10/15/98

Case 2: Lab Measurement

EMC Corporation

IBIS SUMMIT 10/15/98

Case 2: Simulators A, B (IBIS models)

EMC Corporation

IBIS SUMMIT 10/15/98

Case 2: SPICE

EMC Corporation

IBIS SUMMIT 10/15/98

Case 3: Comparison of IBIS models•Data Sheet model vs Spi2IBIS model

EMC Corporation

IBIS SUMMIT 10/15/98

Summary

• SI Simulators, using IBIS models, are complementary and accurate

• IBIS models need to be checked: beware of data sheet models