[SI-LIST] Re: Accounting random jitter
- From: Jayaprakash <edpc108@xxxxxxxxx>
- To: james.plesa@xxxxxxx, ray.anderson@xxxxxxxxxx, scott@xxxxxxxxxxxxx
- Date: Tue, 23 Aug 2005 22:27:38 +0100 (BST)
Thanks all for the reply. Stat eye is perfect for my
application. However my application requires analysis
of Single ended channels while stat eye defines only
differential ones. Is there any workaround ?
regards,
Jayaprakash.
--- "Plesa, James T." <james.plesa@xxxxxxx> wrote:
> Ray,=20
>
> I agree 100%. I incorrectly implied that SPICE
> .noise could coexist with
> a time-domain simulation; but it can't.
>
> And while Monte Carlo might with some effort give a
> value for the eye
> opening, it won't display an eye in the time domain.
>
> And since as Scott said SPICE is deterministic, it
> doesn't include
> time-domain noise even in the simulation of noise
> generators for which
> it has rms noise models, such as zener diodes.=20
>
> If I was stuck with only a SPICE simulator I could
> represent (with
> considerable difficulty) an eye diagram of sorts
> using multiple sources;
> but only for purposes of display, as I would more or
> less need to know
> the answer beforehand in order to design such a
> simulation.
>
> I would defer to Scott's list of tools suited to
> random time-domain
> processes.
>
> Jim Plesa
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of Ray Anderson
> Sent: Tuesday, August 23, 2005 1:34 PM
> To: Plesa, James T.; scott@xxxxxxxxxxxxx;
> edpc108@xxxxxxxxx
> Cc: si-list@xxxxxxxxxxxxx; Ray Anderson
> Subject: [SI-LIST] Re: Accounting random jitter
>
> I always thought the .noise function in spice merely
> determined the
> total RMS noise contribution of the various circuit
> components
> (resistive and active) whose noise performance could
> either be
> calculated or was specified. It isn't obvious to me
> that this function
> can be used to inject jitter into a time domain
> simulation.
>
> Can spice's Monte Carlo statistical capabilities be
> applied to the zero
> crossings of a voltage source? I've always thought
> that it could only
> statistically vary component values.
>
> On the other hand one could probably generate a
> random noise voltage and
> sum it with a reference voltage in a comparator to
> cause random jitter
> on the output of the comparator. Alternatively, the
> random noise source
> could be used to modulate a behavioral VCO clock
> source. This basically
> emulates some techniques that can be applied to
> physical test equipment
> in the lab.
>
>
> -Ray
>
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of Plesa, James T.
> Sent: Tuesday, August 23, 2005 11:00 AM
> To: scott@xxxxxxxxxxxxx; edpc108@xxxxxxxxx
> Cc: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Accounting random jitter
>
> Most or all SPICE simulators that I have used have
> included .NOISE
> analysis and Monte-Carlo analysis, either of which
> would seem suited to
> introducing eye-diagram jitter.=3D3D20
>
> Jim Plesa
> Northrop Grumman Corp.=3D3D20
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of Scott McMorrow
> Sent: Tuesday, August 23, 2005 12:45 PM
> To: edpc108@xxxxxxxxx
> Cc: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Accounting random jitter
>
> Jayaprakash
>
> Unfortunately, no. SPICE is a deterministic
> simulator and does not
> simulate stochasic (random) processes. You will
> need something like
> Agilent ADS, Ansoft Designer, StatEye, or
> roll-your-own Matlab code to
> integrate random noise into your simulations.=3D3D20
>
> regards,
>
> Scott
>
> Scott McMorrow
> Teraspeed Consulting Group LLC
> 121 North River Drive
> Narragansett, RI 02882
> (401) 284-1827 Business
> (401) 284-1840 Fax
>
> http://www.teraspeed.com
>
> Teraspeed(r) is the registered service mark of
> Teraspeed Consulting
> Group LLC
>
>
>
> Jayaprakash wrote:
>
> >Hi,
> >
> > Is there a std. way to include/account random
> jitter effects in =3D
> a=3D3D20
> >typical eye diagram simulation in SPICE?
> >
> > Thanks and regards,
> > Jayaprakash.=3D3D20
> >
> >
> > =3D3D09
>
>___________________________________________________________
> >How much free photo storage do you get? Store your
> holiday snaps =3D
> for=3D3D20
> >FREE with Yahoo! Photos http://uk.photos.yahoo.com
>
>------------------------------------------------------------------
> >To unsubscribe from si-list:
> >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in
> the Subject field
> >
> >or to administer your membership from a web page,
> go to:
> >//www.freelists.org/webpage/si-list
> >
> >For help:
> >si-list-request@xxxxxxxxxxxxx with 'help' in the
> Subject field
> >
> >List FAQ wiki page is located at:
> >
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
> >
> >List technical documents are available at:
> > http://www.si-list.org
> >
> >List archives are viewable at: =3D3D20
> > //www.freelists.org/archives/si-list
> >or at our remote archives:
> > http://groups.yahoo.com/group/si-list/messages
> >Old (prior to June 6, 2001) list archives are
> viewable at:
> > http://www.qsl.net/wb6tpu
> > =3D3D20
> >
> >
> > =3D3D20
> >
>
>
------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in
> the Subject field
>
> or to administer your membership from a web page, go
> to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the
> Subject field
>
> List FAQ wiki page is located at:
>
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
> List technical documents are available at:
> http://www.si-list.org
>
> List archives are viewable at: =3D3D20
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are
> viewable at:
> http://www.qsl.net/wb6tpu
> =3D3D20
>
>
------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in
> the Subject field
>
> or to administer your membership from a web page, go
> to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the
> Subject field
>
> List FAQ wiki page is located at:
>
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
> List technical documents are available at:
> http://www.si-list.org
>
> List archives are viewable at: =3D20
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are
> viewable at:
> http://www.qsl.net/wb6tpu
> =3D20
>
>
>
>
------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in
> the Subject field
>
> or to administer your membership from a web page, go
> to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the
> Subject field
>
> List FAQ wiki page is located at:
>
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
> List technical documents are available at:
> http://www.si-list.org
>
> List archives are viewable at: =20
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are
> viewable at:
> http://www.qsl.net/wb6tpu
> =20
>
>
------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in
> the Subject field
>
> or to administer your membership from a web page, go
> to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the
> Subject field
>
> List FAQ wiki page is located at:
>
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>
> List technical documents are available at:
> http://www.si-list.org
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are
> viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
___________________________________________________________
How much free photo storage do you get? Store your holiday
snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
