[SI-LIST] Re: Transmission line capacitance
- From: Hermann Ruckerbauer <hermann.ruckerbauer@xxxxxxxxxxxxx>
- To: rahul kumar <rahul05kumar@xxxxxxxxx>
- Date: Sat, 24 Oct 2009 14:38:45 +0200
Hi Rahul,
this is some rule of thumb.
Here the corresponding formulas:
Z=SQR(L'/C')
v = 1/SQR(L'*C')
C'=1/(Z*v)
L=Z/v
The rule of thumb I know for a 50OHm transmissionline:
C'=135pF/m
L'=340nH/m
Z = Impedance
v = velocity
L' = characteristic inductance
C' = characteristic capacitance
Regards
Hermann
EKH - EyeKnowHow
Hermann Ruckerbauer
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rahul kumar schrieb:
> Hello all,
> I have seen in standards quoting transmission line capacitance equal to
> 1.5pF per cm . How this number is calculated?
> Is this value frequency dependent? transition dependent ?
>
> Kindly help.
> Suggest link to know more information about the same.
>
> Thanks
>
>
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