1. FEMAS Development - Progress
FEMAS Development Team
March 19, 2013

2. Working Plan Task Description Status Estimated Time
2D Cross. Sect. Analys. Testing
Database for 2D cross. sectional analysis testing
Done
06/12/2012
2D Cross. Sect. Analys. Testing Matrix
Matrix description for 2D cross sectional tests
Released New Version
Released Version of FEMAS
06/05/2012
Long-Term Plan
Including known problems/features and input received during EMC consortium
License file
License file - not only in program file
05/28/2012
2D Cross Sect. Task
In 2D cross sect. analysis will be added possibility to correct RLGC data because of “roughness effect”
Export/Load Plot to/from File
Will be added possibility to save/load plot data and settings into/from the file 2

3. Working Plan Task Description Status Estimated Time Delay Problem
Implemented new algorithm, which makes impulse response “Physically causal”
Done
05/21/2012
Circuits
Circuit block in LPA
2D Cross. Sect – Task
2D cross sect. analysis was transformed from tool to task
Pre-emphasis filter testing
Will be compared matlab and FEMAS results
06/26/2012
Documentation
Developers level: descript. of funct.
Users level: Users manual
07/10/2012
Description of algorithms
07/24/2012 3

4. Working Plan Task Description Status Estimated Time
S-parameters Analysis
Technical specification - Updated
Done
07/10/2012
LPA Testing
Database for Link Path Analysis Testing
Implement help system
User’s manual will be converted in html format and added in FEMAS help
Smoothing filter
Change Wp and Ws parameters from rad/sample to frequency Hz
Changes according to Matteo’s suggestions
Default values, Pre-emphasis taps, Move blocks in schematic matrix, arrange names of channels alphabetically 4

5. Working Plan Task Description Status Estimated Time
Change Linear Interpolation Method
We need to interpolate magnitude and phase instead of real and imaginary parts
Done
07/24/2012
Modify pre-emphasis filter
Implement pre-emphasis filter with any number of pre and post taps
Units
Add units everywhere it is possible: Sources - VHigh, VLow, rise/fall time, bitrate, delay, also in eye diagram
Student License
Limited functionality for students
Smoothing Filter Testing
Test smoothing filter and created test report
Update User’s Manual and Functionalities
Users manual and functionalities where updated according changes made during this two week 5

6. Working Plan Task Description Status Time Student License Modified
Custom geometry for 2D Cross Section Analysis is allowed – restriction is 3 traces
Done
07/31/2012
Smoothing Filter
Add option to choose smoothing method: Butterworth/Chebyshev
Jitter Analysis for Input Signal
Added: Random Jitter, Duty Cycle Distortion and Periodic Jitter to the Source Waveform
Fixed bug in AC simulation
New Release
Will be created new version 6

7. Working Plan Task Description Status Time
Added Possibility to Calculate All Tasks in the Project
Added button “Calculate All” in LPA projects
Done
08/14/2012
Signal Analyzer
Added new tool “Signal Analyzer”
Improved LPA Performance
Added possibility to begin or finish channel with 1 port s-parameters block
Testing of jitter injection
Tao has tasted jitter injection for input waveform
Tested Conversion from Time to Frequency Domain
Compared matlab fft FEMAS Conversion tool and Analytically calculated results for Gaussian, Step, … signals
08/21/2012
Added Validation Check in LPA
Will be calculated recommended frequency range for s-parameters and checked if
Added Filter: Inter-Symbol Interference (in GUI) 7

8. Working Plan Task Description Time Custom geometry
It will be possible to create custom geometry from GUI
Done
08/28/2012
T and P Network sequence
In circuit models will be added possibility to define sequence of parallel and sequential T and P networks – Technical Specification
Tx Equalization – De-emphasis
Tx Equalization now consists Pre-emphasis and De-emphasis 8

9. Working Plan Task Description Time Custom geometry
Added – Triangle, Trapezoid, Circle and Ellipse
Done
09/04/2012
Prepared Environment for DLLs
FIR Equalization
Functionality for De-emphasis, Pre-emphasis and FFE equalization is done
FFE Optimization
Functionality for FFE optimization is done
DFE Equalization
Functionality for DFE equalization is done 9

10. Working Plan Task Description Time
Parallel and series of circuit elements
Add possibility to define Parallel and series of circuit element
Done
09/11/2012
Mutual inductance
Integrate possibility in FEMAS to use mutual inductance
Improvement in custom geometry
Added possibility to remove regions from custom geometry
Custom geometry - Description images
Added description images in GUI for custom geometry
09/18/2012
Tested different cases
Change Student License Activation
License issues will be updated according to new specification
Description of functions in Equalization.dll
Created documentation for Equalization: Description of functions and used algorithms (Only CTLE optimization left) 10

11. Working Plan Task Description Time FEMAS interface for equalization
Prepare FEMAS interface for equalization
Done
10/02/2012
Description of functions in Equalization.dll
Added CTLE optimization
09/25/2012
Equalization.dll
CTLE optimization was added
Test Equalization
Preliminary testing for all functionalities is done.
Integrate Equalization
Integrate equalization into FEMAS GUI
10/16/2012 11

12. Working Plan Task Description Time Tx equalization with gain
Added calculation of tx equalization using gain
Done
10/23/2012
Mathematical operations with equalized waveforms
Added mathematical operations with equalized waveforms for terminations
Post processing Rx equalization
Added possibility to calculate best coefficients and equalize signal without channel calculation
Frequency depended complex impedance
Added frequency depended complex impedance for sources and terminations
Updated documentation
All documentation was updated
Created New release 12

13. Task Description Time Export Debye Model
Corrected export debye model format
10/30/2012
Load training signal from source
Added possibility to load training signal for ffe and dfe optimization from source
Add CTLE block between s-p blocks
CTLE block can be used everywhere in the channel
De-embedding tools was added
Separate tool for de-embedding of s-parameters was added, de-embedding from multiple s-parameters sequence was added and tested
12/11/2012
S-parameters.dll
Was created S-parameters dll and implemented in GUI, we are working with causality function 13

14. Task Description Time Odd and Even mode velocities and impedances
Corrected formulas for odd and even mode velocities and impedances (differential case)
01/15/2012
MVTT
MVTT as a separate tool added
De-embedding Tool
We make tool more intuitive and added graphical representation of the channel
Causality Enforcement
New mathematical solution was developed and implemented in Matlab, now we are implementing into FEMAS
01/22/2012 14

15. Task Description Time odd and even mode velocities and impedances
Tested odd and even mode velocities and impedances
01/22/2012
MVTT Tool
Added possibility to load multiple input files and run them together
Scripting
Enabled scripting for MVTT
New simulation type: De-embedding
Added new type of simulation for more complicated de-embedding
Causality Enforcement
New algorithm for causality enforcement was implementing into FEMAS 15

16. Task Description Time Generate Release for Separate FEMAS tools
Structure of FEMAS was changed and now we can generate FEMAS release with separate tools
02/05/2012
De-embedding
Some restrictions were removed and task became more complete
Transfer function (S-pa5ameters) Extrapolation
Mathematical algorithm for extrapolation was established
MVTT
Dazhao is working with MVTT problems
In Progress 16

17. Task Description Time Scripting
Handled scripting functionality: All scripting functions now throw exceptions on errors, Added test files to all the script examples
02/26/2013
FEMAS help information in console
Added output of some help information in console mode
Material Fitting
Added option which allows to fit material with Epsilon and Sigma infinity to be more than some value
Network Parameters Tool
Added new tool “Network parameters” – Now it is possible to convert Z-parameters to S-Parameters and vice versa
03/05/2013
Changed interface for material fitting options – added Debye model formula and parameters explanation 17

18. Task Description Time Plot Multiple Probe Results
Added possibility to plot multiple probe results in one probe
03/12/2013
Multi Region Conductors
Begin implementation to model multi-part conductors in 2d cross sectional analysis tool
In progress
Transfer function (S-parameters) Extrapolation
We are developing mathematical methods
In Progress
MVTT
New function are implemented 18

19. Task Description Time Symmetric geometry
Now it is possible to calculate automatically several parameters to make geometry symmetric
03/19/2013
Pause in 2d cross sectional analysis
Now It is possible to stop 2d cross sectional analysis calculation and then continue form the next frequency
Multi Region Conductors
We need to modify core as well – and we need Hanfeng’s help
In progress
Transfer function (S-parameters) Extrapolation
New algorithm was implemented in matlab, now we need to implement it into FEMAS
In Progress
MVTT
New function are implemented 19

20. Geometry will be symmetric if
Symmetric geometry
Geometry will be symmetric if
Pw=d+s+d
119= 20

21. Symmetric geometry
If symmetricity is violated, than differential impedances will not be calculated 21

22. Symmetric geometry
Pw=d+s+d
s=Pw-2d
d=(Pw-s)/2 22

23. It is possible to use stop button to stop calculation
Symmetric geometry
It is possible to use stop button to stop calculation 23

24. Already calculated frequencies will be preserved
Symmetric geometry
Already calculated frequencies will be preserved 24

25. Symmetric geometry 25

26. Symmetric geometry 26

27. Extrapolation
Unknown Values – Optimization parameters
. . . 27

28. Magnitude extrapolation
Phase extrapolation
Magnitude extrapolation
Real/Imaginary extrapolation 28

29. Causality before extrapolation
Causality after extrapolation 29

30. On Y axis is an error between original and causal function
Extrapolation
Error Behavior
On Y axis is an error between original and causal function
On X axis is an number of extrapolated intervals
Error before extrapolation was:
Error after extrapolation is: 30

31. Magnitude extrapolation
Phase extrapolation
Magnitude extrapolation
Real/Imaginary extrapolation 31

32. Causality before extrapolation
Causality after extrapolation 32

33. On Y axis is an error between original and causal function
Extrapolation
On Y axis is an error between original and causal function
On X axis is an number of extrapolated intervals
Error before extrapolation was:
Error after extrapolation is: 33

34. MVTT Modules MVTT Tool Math Operations Matrix Operations Name
Description
Connection::inv_general
inversion of dcomplex matrix
Connection::mat_prod_general
Production of two dcoomplex matrices
Connection::truncateMatrix
Truncate part of the matrix
Connection::combineMatrix
Combine two matrices together
Connection::zeros_general
Create a matrix of all zeros
Connection::ones_general
Create a matrix of all ones
Connection::eye_general
Create an identity matrix
Connection::minus_general
Matrix A minus matrix B
Connection::plus_general
Matrix A plus matrix B
Connection::mult_general
Matrix A multiplies a consant b, or vice
Connection::solve_matrix_dss
Solve matrix equation by dss routine
Connection::solve_matrix_pardiso
Solve matrix equation by pardiso routine
Connection::prod_csrmm
Matrix production
Name
Description
Cavity::interpSpara
Interpolate the trace touchstone file S-parameters into frequency samples set by simulation settings.
Cavity::obtain_trunc_mode_number
Get the truncation number for triangular cavity calculation
Cavity::sincfn
Calculate double sinc function of input x.
Calculate dcomplex sinc function of input x.
Cavity::linspace
Interpolate in linear scale
Cavity::logspace
Interpolate in log scale
Cavity::polyarea
Return the area of an polygon
Cavity::FindLayerIndex
Find the layer index given a layer name
Cavity::FindTerminalNewIndex
Find the terminal index for loaded trace
Cavity::FindTopHeight
Find the height of the top of cavity
Cavity::FindBottomHeight
Find the height of the bottom of cavity
Cavity::getmp
Return m
Cavity::nextp
Return z 34

35. Task Description Time AMI source models Extrapolation S-Parameters
Use Hamming Window and Rational Function to extrapolate transfer function, when we have not enough frequencies
Create DLLs for all FEMAS functionalities
Jitter decomposition
Drawing tool for 2D cross sect analysis
Restriction for debye model 35

36. Task Description Time Differential Sources and probes Impedance Matrix
HSpice and PSpice formats in circuit 36