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GTL 260a, b - High Bandwidth Interconnect Models from Measurements
  GTL 260a: First Order Models from Measurements
GTL 260b: Inverse Scattering and High Bandwidth Models
 

This two day, lecture/demo course, thoroughly reviews the practical use of measurements to create and verify high bandwidth models of interconnects. Measurements include impedance analyzer, network analyzer and TDR. Interconnect examples include wire bonds, rf packages, BGAs, connectors, printed circuit board traces, board level discontinuities, lossy lines, coupled lines and differential pairs. Accurate measurements above 10 GHz and below 100 psec rise times are demonstrated on these and other structures, in the class.

Why this class is important for you: The electrical performance of interconnects dramatically affects signal integrity in all high-speed digital, rf and telecomm applications today. In order to meet the shrinking time to market window, it is important to be able to predict the performance of a product before it is released to manufacture. The first step is to create an equivalent electrical circuit model that is accurate up to the application bandwidth. Measurements provide one path to create models and are the ultimate verification of the accuracy of any high bandwidth model.

Level: This course emphasizes the practical methods and techniques of performing and interpreting high bandwidth measurements. Other than the use of real and imaginary components, the mathematics is kept to an absolute minimum. Most calculations are performed using off the shelf simulation tools. In this way, this course is suitable to all levels of engineers involved in high bandwidth design. An advanced degree is not required. However, it is recommended that engineers who do not have a firm understanding of the basic concepts in signal integrity take GTL122.

This course does NOT cover, the basic concepts and theory associated with signal integrity and interconnect design, optimizing the design of interconnects, or models of drivers. These, and many more topics are covered in other GigaTest Labs courses.

This class is taught by Dr. Eric Bogatin
 
 
  Day One

GTL 260a: First Order Models from Measurements

Impedance profiles
Building block elements: R, L, C, T
Impedance in the frequency domain
Calculating and simulating Impedance
Bandwidth of models, interconnects, measurements

TDR Profiles
Time domain reflections from transmission lines
Simulation of TDR
Topology and discontinuities
Demo: extracting models of circuit board traces, discontinuities, and building circuit topology from TDR

Lunch (Provided)

S parameter profiles
Frequency domain reflections from circuit elements
S parameters and the Vector Network Analyzer (VNA)
Simulating a VNA with SPICE, ADS
Smith charts
Demo: VNA, and S parameter profiles of integrated passive structures, PC board traces

Smith Charts
Translating S parameters into impedance profiles
Origin of the Smith Chart
Evaluating model topology from a Smith Chart Measurement
Extracting first order models from Smith Charts
Demo: Smith chart measurements of integrated passive structures, PC board traces

 

Day Two


GTL 260b: Inverse Scattering and High Bandwidth Models

Inverse Scattering Process
Extracting higher bandwidth models
High bandwidth circuit topologies
Extracting models using measurement and simulation
High bandwidth models with R, L, C and T elements
Demo: creating high bandwidth models of wire bonds, capacitors terminating resistors, circuit board traces, vias and bends

Lossy lines
Resistive loss, skin depth, dielectric loss
Modeling lossy lines
Optimizing decoupling capacitors
Measuring material properties
Demo: Extracting models of lossy traces and discontinuities

Lunch (Provided)

Cross talk and differential pairs
NEXT, FEXT in time domain and frequency domain
Microstrips and striplines
Simulating coupled lines
Differential pairs
Demo: TDR and VNA measurements of coupled lines and differential pairs

Connector and package models
Package resonances
Switching noise
Return path lead assignment
Connector and package modeling strategy
Demo: extracting models of leaded packages and BGA packages

For information on hotels in the vicinity, click here.
You may print these pages and use them as a quote.
To check the schedule or enroll for this course, click here.
 
For more information, contact:
Gary Otonari
GigaTest Labs
134 S. Wolfe Rd
Sunnyvale, CA 94086
FAX 408-524-2700
V: 408-524-2700
garyo@gigatest.com

 
 
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