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qslazio
Joined: 23 May 2004
Posts: 194
Helped: 9
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 17 Sep 2006 14:53 capacitance between wires |
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how to calculate the parasitic capacitance between parallel wires?
I'm designing in 0.35u cmos process, in the chip, I've to route 2 long wire (about 400um length), which has 125 Meg Hz signals on them.
Before layout, how can I estimate the capacitance of them?
Is there any reference of equation I can refer to?
Thanks in advance!
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pfd001
Joined: 23 Jul 2005
Posts: 397
Helped: 34
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18 Sep 2006 3:10 parallel wire capacitance |
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| You can check your pdk. There should be a parasitic cap for your case.
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rajkumaru
Joined: 11 Jul 2006
Posts: 89
Helped: 5
Location: Bangalore(INDIA)
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18 Sep 2006 8:09 calculate capacitance between parallel wires |
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Hi pfd001,
What is PDK?
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kamesh419
Joined: 11 Feb 2005
Posts: 37
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18 Sep 2006 12:43 capacitance between parallel wires |
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PDK : Process Design Kit
You can find information relating to the capacitance between 2 parallel wires in the documentation under the directory relating to that Process.
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18 Sep 2006 12:43 Ads |
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apple_fandai
Joined: 10 Sep 2006
Posts: 3
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18 Sep 2006 16:31 Re: how to calculate the parasitic capacitance between wires |
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| The simplest way is to draw two wire and extract the parasitic capacitance.
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shaikhsarfraz
Joined: 08 Aug 2006
Posts: 309
Helped: 19
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20 Sep 2006 12:49 Re: how to calculate the parasitic capacitance between wires |
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hi,
as a rule of thumb routing capacitance is taken as
.35*R*C*L*L
where R is resistance of routing wire given in PDK.
C is the capacitance and L is the length of the wire.
thanks
sarfraz
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