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

Istvan the core current fluctuation is obtainable through the Quartus 
design tool.  The device / package parasitics, including die capacitance 
are not openly published.  They have to be obtained from Altera by asking.

Best Regards,


Steve.
Istvan Novak - Board Design Technology wrote:
> Steve, Alexandre,
>
> I guess the most helpful information would be to know the amount of 
> on-package core
> capacitance and the cumulative inductance of the package's core path 
> and also the
> expected maximum core-current fluctuation...
>
> Regards,
> Istvan
>
>
>
>
> steve weir wrote:
>> Alexandre, in order to properly design the core PDN you need to know the 
>> device parasitics.  Once the package to PCB inductance becomes limiting, 
>> there is little to nothing that the PCB can do to further improve power 
>> delivery to the die.
>>
>> In order for Tr of the core to be a serious board design issue the core 
>> has to have grossly inadequate local storage.  The Stratix III does not 
>> suffer that problem. 
>>
>> Steve.
>> Alexandre.AMEDEO@xxxxxxxxxxxxxxxxxx wrote:
>>   
>>> Steve, 
>>>
>>> Mon problème n'est pas du pouvoir(de la puissance), mais de la gamme de 
>>> fréquence.
>>> Pour l'entrée-sortie de découplage, je suis ok et j'utilise l'expert de 
>>> pouvoir(puissance) Altera, Pour "la Tension Fondamentale" j'ai utilisé 
>>> 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 à 0.35/Trise.
>>> Donc je ne sais(connais) pas comment définir la fréquence de découplage 
>>> maximale.
>>>
>>> Merci pour votre aide
>>>
>>> Alexandre AMEDEO
>>>
>>>  
>>>
>>> -----Message d'origine-----
>>> De : steve weir [mailto:weirsi@xxxxxxxxxx]
>>> Envoyé : mercredi 23 avril 2008 16:19
>>> À : 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.  
>>> For impedance you will need to estimate the number of resources that you 
>>> will be using and their switching frequency.  Alternatively, the 
>>> estimator will evaluate a completed design.  To get the details of the 
>>> component parasitics you need to talk to Altera.
>>>
>>> Steve.
>>> Alexandre.AMEDEO@xxxxxxxxxxxxxxxxxx wrote:
>>>   
>>>     
>>>> Hi everybody,=20
>>>>
>>>> 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 =
>>>> 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.=20
>>>> The target impedance is the same for all the frequencies, is it ok?
>>>> Some people speak about adaptative target impedance (the current is
>>>> decreased with frequency thus the target impedance is increased)?=20
>>>> Is there a formula to define target impedance with F dependency, Z(f)?  =
>>>>
>>>>
>>>> If anybody has some information about this two points,=20
>>>> Thank you for all your answers
>>>>
>>>> Alexandre AMEDEO
>>>>
>>>>
>>>>
>>>>
>>>> -----Message d'origine-----
>>>> De : si-list-bounce@xxxxxxxxxxxxx
>>>> [mailto:si-list-bounce@xxxxxxxxxxxxx]De la part de navaram kumar
>>>> Envoy=E9 : mercredi 23 avril 2008 15:10
>>>> =C0 : si-list@xxxxxxxxxxxxx
>>>> Objet : [SI-LIST] How to do optimization for minimum power delay =
>>>> product
>>>>
>>>>
>>>> Hi
>>>> How to do optimization for minimum powerdelay product.
>>>> Can anybody give me some idea where to start
>>>> Thanks& Regards
>>>> K.Navaram Kumar
>>>>
>>>> ------------------------------------------------------------------
>>>> 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:
>>>> http://www.freelists.org/webpage/si-list
>>>>
>>>> For help:
>>>> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>>>>
>>>>
>>>> List technical documents are available at:
>>>>                 http://www.si-list.net
>>>>
>>>> List archives are viewable at:    =20
>>>>            http://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:
>>>> http://www.freelists.org/webpage/si-list
>>>>
>>>> For help:
>>>> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>>>>
>>>>
>>>> List technical documents are available at:
>>>>                 http://www.si-list.net
>>>>
>>>> List archives are viewable at:     
>>>>            http://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
>>>>   
>>>>
>>>>
>>>>   
>>>>     
>>>>       
>>>   
>>>     
>>
>>
>>   
>


-- 
Steve Weir
Teraspeed Consulting Group LLC 
121 North River Drive 
Narragansett, RI 02882 

California office
(866) 675-4630 Business
(707) 780-1951 Fax

Main office
(401) 284-1827 Business 
(401) 284-1840 Fax 

Oregon office
(503) 430-1065 Business
(503) 430-1285 Fax

http://www.teraspeed.com
This e-mail contains proprietary and confidential intellectual property of 
Teraspeed Consulting Group LLC
------------------------------------------------------------------------------------------------------
Teraspeed(R) is the registered service mark of Teraspeed Consulting Group LLC

------------------------------------------------------------------
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:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field


List technical documents are available at:
                http://www.si-list.net

List archives are viewable at:     
                http://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: