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# Assignment Guideline A. Purpose To write a MATLAB program to work on small-signal modeling, all the equations applied in the program will be shown in the following B. Materials provided 1....

Assignment Guideline
A. Purpose
To write a MATLAB program to work on small-signal modeling, all the equations
applied in the program will be shown in the following
B. Materials provided
1. Cold-pinchoff device measured S-parameters
2. Cold-forward device measured S-parameters
C. Requirements to for the program (Please follow them step by step)
1. Read in the Cold-pinchoff S-parameters
2. Plot the S-parameters in rectangular plot (X-axis: frequency (GHz), Y-axis: (dB))
3. Transform the S-parameters into Z-parameters
4. ?11 = ?? + ?? + ??(?? + ??) +
1
??
(
1
??
+
1
??
) + Î´??
?22 = ?? + ?? + ??(?? + ??) +
1
??
(
1
??
+
1
??
) + Î´??
?12 = ?21 = ?? + ??(??) +
1
??
(
1
??
) + Î´??
5. Plot the figure as shown below, the slope of the lines are the Ï‰??, Ï‰??, Ï‰??
The axis value are shown by the axis
6. Read in the Cold-forward S-parameters
7. Plot the S-parameters in rectangular plot (X-axis: frequency (GHz), Y-axis: (dB))
8. Transform the S-parameters into Z-parameters
9. Plot another figure as shown below, the slope of the lines are shown in the
figure also
The axis value are shown by the axis
10. Form an chart shows the value of Inductors and Resistors, also please derive
the capacitors
Then, put the value back to Imaginary part of Z-parameters, you can derive the
capacitors
Answered Same Day May 25, 2020

## Solution

Anupam answered on May 31 2020
Solution/cold_forward.s2p
!S2P format file containing S-parameter Data (mag and phase)
!Lot ID:EP180E036
!Wafer ID:W5
!Fri Jan 6 09:45:42 2012
!Bias:VDS=0V;VGS=-2V;IDS=0.00013924mA;IGS=-0.00019264mA
# GHZ S MA R 50
2    0.9970962639    -7.39625628    0.060899302    82.60232622    0.06072419977    82.60265414    0.9977775421    -6.773120087
2.96    0.9947805376    -10.99142926    0.09091814315    79.59863238    0.09093823876    79.64982839    0.9964448184    -10.04479621
3.92    0.9904011866    -14.5333662    0.1199618669    75.65571587    0.1197051971    75.62805301    0.992188882    -13.31561886
4.88    0.9844609401    -18.04570895    0.1481945865    71.98570843    0.1480122938    72.01246022    0.9867190427    -16.53322964
5.84    0.9779053609    -21.51124004    0.1754377791    68.40539304    0.1752246107    68.31070923    0.9811300727    -19.71040275
6.8    0.9704713252    -24.93156053    0.201811609    64.859007    0.2016476151    64.88741788    0.9744461191    -22.81243428
7.76    0.9616238346    -28.28189823    0.2272457592    61.41111141    0.2271733821    61.4166738    0.9669473693    -25.90597196
8.72    0.9524836521    -31.58679321    0.2515560586    58.05004933    0.2514002567    58.1264474    0.9590508662    -28.95471684
9.68    0.9425414429    -34.80768531    0.2745242533    54.70918851    0.2742725243    54.72852698    0.9495891587    -31.96517309
10.64    0.933101282    -37.95158635    0.2967393354    51.60196595    0.2963575554    51.56220574    0.9405559221    -34.81928843
11.6    0.9231742337    -41.04731953    0.3175974752    48.37425116    0.317379903    48.35214332    0.9317491842    -37.71929062
12.56    0.9132011172    -44.1551253    0.3373787484    45.27763834    0.3373296266    45.26578846    0.9231905945    -40.50617633
13.52    0.9017529575    -47.10095903    0.3560530306    42.22603912    0.3557307851    42.29319093    0.9142237104    -43.33088844
14.48    0.8904348007    -50.05662926    0.3737842349    39.23806957    0.3731368673    39.21636197    0.903707916    -45.94544147
15.44    0.8788865481    -52.94987412    0.3895822972    36.30258144    0.3896237968    36.23134608    0.8954034957    -48.62157502
16.4    0.869259992    -55.5841186    0.4047802847    33.45702955    0.4044591803    33.42749503    0.8850873272    -51.15971046
17.36    0.8579344642    -58.33227413    0.4187541031    30.70955728    0.4180755762    30.66756694    0.8762044374    -53.62463357
18.32    0.8472027655    -61.0492478    0.4322248513    27.83433809    0.4317546402    27.79856041    0.8667030072    -56.22880012
19.28    0.837110398    -63.61992178    0.4435137043    25.26370103    0.4429037518    25.20282433    0.8588854479    -58.54813679
20.24    0.8261101478    -66.1374377    0.4539182466    22.5832306    0.4534011189    22.56661505    0.848844333    -61.00223023
21.2    0.8148878089    -68.41098062    0.4637750361    20.02742664    0.4629030008    20.01249391    0.8420916258    -63.25663845
22.16    0.8086770722    -70.97972933    0.4730382024    17.58100266    0.4725024685    17.57830861    0.8346327271    -65.50124869
23.12    0.7992505174    -73.26781784    0.4810731867    15.10731112    0.480284215    15.07995879    0.826408348    -67.73107515
24.08    0.7921951369    -75.51940909    0.4876905491    12.70265958    0.4882695961    12.76806567    0.8206799424    -69.91751558
25.04    0.7851716094    -77.84801821    0.4946476774    10.46482811    0.4945259656    10.40810387    0.8149378381    -72.05629542
26    0.7737366971    -79.91426608    0.4991894158    8.217539348    0.4981665857    8.21325078    0.8042981354    -74.08473259
26.96    0.7702246601    -82.18006351    0.505570121    6.02548422    0.5052508017    6.011905529    0.8038380097    -76.33884389
27.92    0.7633375769    -84.29146076    0.5115190861    3.882753179    0.5103927497    3.839825838    0.7992669872    -78.28676327
28.88    0.7570255702    -86.31805871    0.5142885752    1.788631435    0.5139441627    1.864717887    0.7938509212    -80.29974
29.84    0.7529920009    -88.4486458    0.518202041    -0.4217817895    0.5172863987    -0.4123867376    0.7915636759    -82.49903575
30.8    0.7483387365    -90.38319631    0.5212756696    -2.331898304    0.5199625164    -2.334427069    0.7874178108    -84.33271112
31.76    0.7412260033    -92.29588996    0.5224401403    -4.261123743    0.5224851387    -4.237257127    0.7824768402    -86.30811076
32.72    0.7386067181    -94.40995954    0.5239710577    -6.262794427    0.5224321637    -6.166846847    0.782577958    -88.4402508
33.68    0.7348957877    -96.42084952    0.525960998    -8.327101253    0.5259202304    -8.22695227    0.7777374203    -90.4811256
34.64    0.7286972708    -98.28077357    0.5287506171    -9.766222824    0.5279080025    -9.936607656    0.7750199053    -92.20701978
35.6    0.7264276718    -100.2727549    0.5298869088    -11.57852495    0.5289517772    -11.75789233    0.7700324592    -94.28202099
36.56    0.720155032    -102.0041767    0.5305257907    -13.41429546    0.5302659059    -13.35324065    0.7680920556    -96.02092086
37.52    0.7160755415    -103.9533016    0.5307289011    -15.23173167    0.5299047176    -15.29365828    0.7630400395    -98.09770328
38.48    0.7137900922    -105.7529604    0.5312924665    -16.91737102    0.529427403    -16.92356079    0.7626822328    -99.86558812
39.44    0.7107927038    -107.2633712    0.5304692538    -18.41831503    0.5293887027    -18.37022866    0.7572701092    -101.4195285
40.4    0.7111020272    -109.447378    0.5297358721    -19.92297754    0.5319849426    -20.3269261    0.7544894541    -103.9974549
41.36    0.7108046747    -111.2770166    0.5299228329    -21.94361901    0.5296127108    -21.86455023    0.7597919926    -105.2341329
42.32    0.7038697523    -112.5501167    0.5316627866    -23.32689338    0.5301624177    -23.4255692    0.7543016459    -106.9041962
43.28    0.7013537227    -113.9083496    0.5304258515    -24.8436507    0.5310819689    -24.99227009    0.7516980063    -108.7313744
44.24    0.6990556252    -116.0761858    0.5283299343    -26.6250444    0.5294294087    -26.6448115    0.7534129257    -110.7334559
45.2    0.7021650833    -117.6174684    0.5298948954    -28.085195    0.5270591757    -28.01843326    0.7502122972    -112.1359379
46.16    0.6937790419    -119.2350291    0.5289573362    -29.92202517    0.5276460207    -29.64691047    0.7475490856    -114.0914308
47.12    0.6969629067    -121.2623363    0.5249408145    -31.69698321    0.5249077059    -31.5895892    0.7503569673    -115.5406144
48.08    0.6950712151    -121.8059355    0.5267691795    -33.75676654    0.524423593    -32.96319824    0.7529557546    -116.1942864
49.04    0.6954507319    -124.0024731    0.523079644    -34.72804593    0.5279732968    -34.62197571    0.7470135771    -118.6653372
50    0.6934366756    -125.2988185    0.5126956121    -34.86448755    0.5161516039    -35.42902476    0.7485372044    -120.3944892
Solution/cold_pinchoff.s2p
!S2P format file containing S-parameter Data (mag and phase)
!Lot ID:EP180E036
!Wafer ID:W5
!Fri Jan 6 09:45:57 2012
!Bias:VDS=0V;VGS=0V;IDS=0.028634mA;IGS=-2.8032E-005mA
# GHZ S MA R...
SOLUTION.PDF