wire model
TRANSCRIPT
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8/16/2019 Wire Model
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Wire Modeling
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8/16/2019 Wire Model
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Capacitance Of wire
w w s
t
h2
One ground
w sh1
Two grounds
where}628.0)]()(348.1)(053.0[
])()[(637.1{
597.1
216.0216.0
21
s
h
s
t
s
w
h
t
h
t
h
wC
++
++= ε
21
21
hh
hhh
+
⋅
=
})]()(227.1)(229.0[)(977.2{ 0398.0384.1232.0 s
h
s
t
s
w
h
t
h
wC +++= ε
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8/16/2019 Wire Model
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Calculation
In processofreleasing
In process of Designrelease (Not
released yet)
14.245
7.815
In process of Designrelease (Not
released yet)
14.1
7.83
4.23
Unit Segment LengthCalculation
Time constant for unit segment = One tenth of Transition time of 8X buffer For Segment length
Where Ru=Unit length resistanceCu=Unit length capacitance
l =Unit segment length
Resistance per square =Rsq
Unit ength resistance !Ru" =Rsq #w $here w =width of metal
uu
uu
C R
td l
td l C l R
td RC
5
10/2/)***(
10/2/
=
==
==
τ
τ