# [SI-LIST] Re: What is the frequency range of the Stratix III cor e

• From: Alexandre.AMEDEO@xxxxxxxxxxxxxxxxxx
• To: weirsi@xxxxxxxxxx
• Date: Wed, 23 Apr 2008 16:45:53 +0200
```Steve,=20

Mon probl=E8me n'est pas du pouvoir(de la puissance), mais de la gamme =
de fr=E9quence.
Pour l'entr=E9e-sortie de d=E9couplage, je suis ok et j'utilise =
l'expert de pouvoir(puissance) Altera, Pour "la Tension Fondamentale" =
j'ai utilis=E9 aussi ces outils pour le pouvoir(la puissance).
Mais je n'ai aucune information sur le temps de hausse de signal =
fondamental ?

Je veux maintenir(entretenir) la cible impedance de DC =E0 0.35/Trise.
Donc je ne sais(connais) pas comment d=E9finir la fr=E9quence de =
d=E9couplage maximale.

Merci pour votre aide

Alexandre AMEDEO

=20

-----Message d'origine-----
De : steve weir [mailto:weirsi@xxxxxxxxxx]
Envoy=E9 : mercredi 23 avril 2008 16:19
=C0 : Alexandre.AMEDEO@xxxxxxxxxxxxxxxxxx
Cc : si-list@xxxxxxxxxxxxx
Objet : Re: [SI-LIST] What is the frequency range of the Stratix III
core

Alexandre, Altera has a power planning tool that is part of Quartus. =20
For impedance you will need to estimate the number of resources that =
you=20
will be using and their switching frequency.  Alternatively, the=20
estimator will evaluate a completed design.  To get the details of the=20
component parasitics you need to talk to Altera.

Steve.
Alexandre.AMEDEO@xxxxxxxxxxxxxxxxxx wrote:
> Hi everybody,=3D20
>
> I try to define the Power distribution System for the core voltage of =
a
> Stratix III,
> but I don't know how to define the Frequency Target. The datasheet =
=3D
> doesn't
> specify the rise time of the core Clock.
> I have just the frequency of the core.
>
> I work with Power Integrity from Cadence.=3D20
> The target impedance is the same for all the frequencies, is it ok?
> decreased with frequency thus the target impedance is =
increased)?=3D20
> Is there a formula to define target impedance with F dependency, =
Z(f)?  =3D
>
>
>
> Alexandre AMEDEO
>
>
>
>
> -----Message d'origine-----
> De : si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]De la part de navaram kumar
> Envoy=3DE9 : mercredi 23 avril 2008 15:10
> =3DC0 : si-list@xxxxxxxxxxxxx
> Objet : [SI-LIST] How to do optimization for minimum power delay =3D
> product
>
>
> Hi
> How to do optimization for minimum powerdelay product.
> Can anybody give me some idea where to start
> Thanks& Regards
> K.Navaram Kumar
>
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--=20
Steve Weir
Teraspeed Consulting Group LLC=20
121 North River Drive=20
Narragansett, RI 02882=20

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