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Course Outlines

 

Introduction to High Frequency Electrical Interconnects
This class is intended for technical professionals who design or employ electrical interconnects for high-frequency applications. The class reviews methods for parameterizing interconnects and solving the resulting equations. Measured and calculated parameter values are compared for example interconnects (often referred to as multiconductor transmission lines or MTLs in the technical literature). Representative problems illustrate using the methods to model system characteristics including delay, rise time and cross talk.

Course Outline:

Introduction

1) Class goals
2) develop interconnect (MTL) analysis tools
3) apply tools to examples
4) Assumptions – i.e. when to trust the results

Finding MTL Parameters

5) Closed form solutions
6) FEM solutions
7) example trace parameters
8) computed versus measured parameter values

Solving MTL Equations

9) Frequency domain solutions
10) Time domain solutions
11) Numerical examples

Cross Talk

12) Ground-impedance effects
13) Interconnect-parameter effects

Shock & Vibration Response Spectra and Software Training
This course combines a viewgraph presentation with hands-on software training. Each student must bring a notebook PC with Windows 95, 98, ME, NT, 2000 or XP operating system. They will receive a copy of EasyPlot software and programs which will perform the following calculations: power spectral density (PSD), Fast Fourier Transforms (FFT), shock response spectrum (SRS), and digital filtering. Students will also receive time history data samples so that they can practice using the software programs. Students are welcome to bring their own data samples.

Course Outline:

1) Natural frequency and damping from flight data
2) Sine vibration characteristics, GRMS, histogram, kurtosis
3) Sine sweep frequency, octave calculation
4) Random vibration characteristics, GRMS, histogram, kurtosis
5) Nonstationary random vibration, GRMS versus time
6) Fourier transforms
7) Power spectral density, GRMS
8) Transmissibility function for acceleration
9) Transmissibility function for force
10) Vibration response spectrum - Miles rule
11) Vibration response spectrum - general method
12) Synthesizing time history to satisfy power spectral density using sinusoids
13) Synthesizing time history to satisfy power spectral density using random vibration
14) Integration of acceleration time history to determine displacement and velocity
15) Integration of power spectral density
16) Sample rate criteria/Nyquist rule
17) Aliasing
18) Filtering
19) Force shock, classical pulse, develop SRS
20) Force shock, arbitrary pulse, develop SRS, arbit program
21) Base excitation, classical pulse, develop SRS, sdofi program
22) Base excitation, arbitrary pulse, develop SRS
23) Integration to velocity and displacement
24) Simple trend removal



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