[SI-LIST] Re: Hspice vs. Eldo
- From: "QU Perry" <Perry.Qu@xxxxxxxxxxxxxxxxxx>
- To: <Chris.Cheng@xxxxxxxx>
- Date: Thu, 1 Nov 2007 18:05:11 -0500
Chris:
Can you provide some details on the "free or low cost vector fitting
tool" for S parameter modelling in Hspice ? I guess you are refering to
something similar to Sigrity broadband spice which was brought to my
attention by Scott a few years ago on the SI list, but that tool is
probably not low cost. I'm interested to know any other alternatives.
Thanks
Perry
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20
Perry Qu=20
Design & Qualification, Alcatel-Lucent Canada Inc.
600 March Road, Ottawa ON, K2K 2E6, Canada=20
DID: 613-7846720 Fax: 613-5993642=20
Email: perry.qu@xxxxxxxxxxxxxxxxxx=20
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20
=20
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx=20
> [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Chris Cheng
> Sent: Thursday, November 01, 2007 5:37 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Hspice vs. Eldo
>=20
> In an ideal world, we can have whatever we want.
>=20
> But in a real world, ask yourself if you are a silicon vendor=20
> will you =3D willing to :
> a) pay extra to get an AMS tool that has nothing to do with=20
> your silicon =3D design flow
> b) invest in the manpower to qualify your internal SPICE=20
> (most likely =3D
> HSPICE) model with ELDO or whatever AMS standard
>=20
> HSPICE with S-parameter or W element is a problematic path to=20
> say the =3D least. But I can get around it with other tools=20
> that can generate =3D something HSPICE can feed on and work.=20
> That are plenty of free or low =3D cost vector fitting tools=20
> that can help you get around the S-parameter =3D or W-element=20
> problem with HSPICE.=3D20
>=20
> Ask yourself this question, with all the hype about IBIS 4.2=20
> with SSO, =3D how many silicon vendor even border to publish that =
?=3D20
>=20
> Tool vendors can promise you a lot of things. At the end of=20
> the day, it =3D is your silicon vendor that has to do it.
>=20
> And coming from experience from both sides of the table, I=20
> have seen =3D plenty of customers that demand certain models in=20
> HSPICE, IBIS etc and =3D just sit on it after they are=20
> delivered. I have done audit on usage of =3D models after=20
> customers received them and surprise surprise less than 10% =3D=20
> of them are actually simulating anything with them. This is=20
> hardly a =3D statistic that encourage me to invest in=20
> generating extra models.
>=20
> You may be the busy bee out there that work on simulating=20
> every net you =3D have with every model you get. But there are=20
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