IBIS-AMI for SerDes Modeling

October 19, 2018 Cadence PCB Solutions

IBIS-AMI is today's standard format for system-level SerDes modeling
A different type of modeling expertise is required to develop AMI models
Modeling the adaptive CTNLE functionality in the Analog Bits Rx is the most challenging AMI effort we have undertaken to date
Transistor-level accuracy can be obtained with high capacity channel simulation to predict BER using AMI modeling, even for the most complex EQ architectures

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IBIS-AMI for SerDes Modeling

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As the transferring rate increase, Power Integrity becomes a more and more critical issue in modern high speed design.

Typically simultaneous switching noise (SSN) transient simulations require significant CPU and RAM resources.

Power and ground planes in a printed circuit board may connect to the power supply at several locations. Moreover, a number of decoupling capacitors may be connected to the power and ground planes.

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Standard IBIS-AMI models can be used for modeling repeaters. No additional change in IBIS-AMI expression

This paper will suggest methodologies for creating a “virtual prototype” of your serial link pre-design, and how to create the associated interconnect and SerDes models that go with it.

Ultra-low impedance measurement and proper embedded technique should be applied to obtain the good correlation

This paper presents full-wave electromagnetic field simulations on the effects of shorting via arrays for the reduction of power and ground noise in IC packages.

The electrical characteristics of the power and ground supply of a PC microprocessor packaged in a Ball Grid Array (BGA) package mounted on a card are studied by dynamic electromagnetic field analysis

The focus of this paper is the low frequency portion, including DC, of the spectrum for broadband Sparameters and guidelines to support successful SSO analysis for Chip-Package Board systems.

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End users require ready access to accurate package models with increasingly complex packages, detailed PI consideration, and higher bandwidth

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Panel session addressing high-speed channel design challenges

Simulation / Measurement correlation requires accurate modeling of TX/RX/Channel

For upcoming industrial specification of very high speed signals, channel discontinuity and crosstalk become important.

Broadband methodology has the advantages of greater insight for the system-level influence of each domain as well as enabling resonance effects to be avoided at critical system frequencies.