| Author |
Message |
amit bansal
Guest
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 Posted:
Wed Sep 28, 2005 4:10 pm Post subject:
Seeing noise anlaysis in spectre |
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Hi all,
I have a circuit , I am doinhg noise analysis in Spectre for it. I want
to see contribution of each component on output noise current, so I
opened result browser after simulation. In this under the noise-noise
they specify component name and for each component there is value. So
it wants to give some info about each component's contribution but I am
not able to understand what these value stand for?
Can somebody help me with this?....
Thank you
Regards
Amit Bansal
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Andrew Beckett
Guest
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| Posted:
Thu Sep 29, 2005 8:10 am Post subject:
Re: Seeing noise anlaysis in spectre |
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On 28 Sep 2005 06:12:48 -0700, "amit bansal" <bansal177@yahoo.com> wrote:
| Quote: | Hi all,
I have a circuit , I am doinhg noise analysis in Spectre for it. I want
to see contribution of each component on output noise current, so I
opened result browser after simulation. In this under the noise-noise
they specify component name and for each component there is value. So
it wants to give some info about each component's contribution but I am
not able to understand what these value stand for?
Can somebody help me with this?....
Thank you
Regards
Amit Bansal
|
This is the contribution of each noise source in each device at the _output_ of
the circuit. It's in V^2/Hz (or V/sqrt(Hz) - I forget). Or it would be in A^2/Hz
or A/sqrt(Hz) if the measured output is a current (i.e. you've done a probe
for the output).
Just checked - they'll be in V^2/Hz or A^2/Hz
Regards,
Andrew. |
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amit bansal
Guest
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| Posted:
Thu Sep 29, 2005 12:10 pm Post subject:
Re: Seeing noise anlaysis in spectre |
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Thank you very much for the reply. But I am still confused. I am doing
noise analysis for output current and done a iprobe at the output.
Shdn't the sum of square root of these values be eqaual to the
current value at the output ? I tried to varify the same but it is not
coming true. please comment on this.
regards
Amit
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Dmitriy Shurin
Guest
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| Posted:
Thu Sep 29, 2005 1:49 pm Post subject:
Re: Seeing noise anlaysis in spectre |
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Hey Amit!
We are from VLSI CENTER BGU working on the same simulation ,
without much success ,I would appreciate if you'll send me documentation
about noice simulation on email basss@bgu.ac.il ,the help of cadence is
not helping much...
"amit bansal" <bansal177@yahoo.com> wrote in message
news:1127996889.098457.261900@f14g2000cwb.googlegroups.com
| Quote: | Sorry for troubling you , you are absolutely correct that it is
A^2/Hz, I had a flaw in my circuit thats why I was not able to verify
it. it is correct that out = sqrt( component1+component2+.....)
thanks
Amit
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--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
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amit bansal
Guest
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| Posted:
Thu Sep 29, 2005 4:10 pm Post subject:
Re: Seeing noise anlaysis in spectre |
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Sorry for troubling you , you are absolutely correct that it is
A^2/Hz, I had a flaw in my circuit thats why I was not able to verify
it. it is correct that out = sqrt( component1+component2+.....)
thanks
Amit |
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Andrew Beckett
Guest
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| Posted:
Thu Sep 29, 2005 8:10 pm Post subject:
Re: Seeing noise anlaysis in spectre |
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On Thu, 29 Sep 2005 13:49:16 +0000 (UTC), "Dmitriy Shurin"
<shurin@bgumail.bgu.ac.il> wrote:
| Quote: | Hey Amit!
We are from VLSI CENTER BGU working on the same simulation ,
without much success ,I would appreciate if you'll send me documentation
about noice simulation on email basss@bgu.ac.il ,the help of cadence is
not helping much...
"amit bansal" <bansal177@yahoo.com> wrote in message
news:1127996889.098457.261900@f14g2000cwb.googlegroups.com
Sorry for troubling you , you are absolutely correct that it is
A^2/Hz, I had a flaw in my circuit thats why I was not able to verify
it. it is correct that out = sqrt( component1+component2+.....)
thanks
Amit
|
If you have sourcelink access, you might be interested in my solution number
11025268 - "Worked example of noise calculations in simple circuit"
Regards,
Andrew. |
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amit bansal
Guest
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| Posted:
Fri Sep 30, 2005 8:10 am Post subject:
Re: Seeing noise anlaysis in spectre |
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I dont have any documentation . But I may be able to help u in some
problem of urs. |
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tritue
Guest
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| Posted:
Fri Sep 30, 2005 8:10 pm Post subject:
Re: Seeing noise anlaysis in spectre |
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Hi,
You can goes to Result / Print /Noise summary in the Analog artist menu,
That will open a form which alow you to print all the noise source with
their contribution.
The value will be in V/sqrt(Hz) because the total (integrated) noise will be
equal to Noise * sqrt(bandwidth of the signal).
Good luck
"amit bansal" <bansal177@yahoo.com> wrote in message
news:1127913168.450316.299860@g49g2000cwa.googlegroups.com...
| Quote: | Hi all,
I have a circuit , I am doinhg noise analysis in Spectre for it. I want
to see contribution of each component on output noise current, so I
opened result browser after simulation. In this under the noise-noise
they specify component name and for each component there is value. So
it wants to give some info about each component's contribution but I am
not able to understand what these value stand for?
Can somebody help me with this?....
Thank you
Regards
Amit Bansal
|
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Dmitriy Shurin
Guest
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| Posted:
Sat Oct 01, 2005 2:04 pm Post subject:
Re: Seeing noise anlaysis in spectre |
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| Quote: | If you have sourcelink access, you might be interested in my solution number
11025268 - "Worked example of noise calculations in simple circuit"
Regards,
Andrew.
|
Andrew first of all thank you very much for your help , I always learn a
lot from your answers
secondly I don't have access to sourcelink , is it a link on a web?
--
Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
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