Re: [IBIS-Users] How I can extract two value for vinh and vinl

From: Akhilesh CHANDRA <akhilesh.chandra_at_.....>
Date: Mon Feb 20 2006 - 04:02:05 PST
Hello Lynne,

   Thanx for your reply.

   For VInh and Vinl it's OK. I have problem to extract VINH+, VINH-, 
VINL+ & VINL- values. How  can I extract these values on one PVTSC by 
simulation.


Regards
Akhilesh

Lynne D. Green wrote:

>Hello, Akilesh,
>
>The interconnect specification (such as TTL or PCI) specifies the I/O
>characteristics, including Vinh and Vinl.  For example, if I remember
>correctly, TTL specifications are Vinl=0.8V and Vinh=2.0V.
>
>If you are not using a standard interconnect, then see my paragraph about
>PVT simulations.
>
>Best regards,
>Lynne
>
>
>
>-----Original Message-----
>From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf
>Of Akhilesh CHANDRA
>Sent: Thursday, February 02, 2006 7:39 PM
>To: Lynne D. Green
>Cc: 'ibis-users'; 'ibis'; Akhilesh CHANDRA
>Subject: Re: [IBIS-Users] How I can extract two value for vinh and vinl
>
>Hello Lynne,
>
>   I am not able to understand how these values come from interconnect
>specification.
>
>  I am also not able to understand what is externel specification.
>
>  In my view I have a spice netlist and run our simulation to extract VINH
>and VINL. According to me one design have one VINH and one VINL value at one
>process, voltage and temp. How I can extract two value of VINH and VINL at
>one process voltage and temp.
>
>    Please correct if I am wrong.
>
>Regards
>Akhilesh
>
>Lynne D. Green wrote:
>
>  
>
>>Hello, Akilesh,
>>
>>These values normally come from the interconnect specification.  If 
>>there are no parameters equivalent to Vinh+, Vinh-, Vinl+ & Vinl-, then 
>>these parameters are not used in the IBIS model.
>>
>>If you are not following an external specification, then you need to do 
>>a complete PVT (process, voltage, temperature) analysis for Vinh and 
>>Vinl (not just one corner).
>>
>>- Lynne
>>
>>
>>"IBIS training when you need it, where you need it."
>>
>>Dr. Lynne Green
>>Green Streak Programs
>>http://www.greenstreakprograms.com
>>425-788-0412
>>lgreen22@mindspring.com
>>
>>
>>-----Original Message-----
>>From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On 
>>Behalf Of Akhilesh CHANDRA
>>Sent: Thursday, February 02, 2006 2:24 AM
>>To: ibis-users; ibis
>>Cc: akhilesh chandra
>>Subject: [IBIS-Users] How I can extract two value for vinh and vinl
>>
>>
>>
>>Hi,
>>
>>    I have just one query. According to the IBIS specification we can 
>>support Vinh+, Vinh-, Vinl+ & Vinl-.
>>
>>  I extract these valuse by applying one pulse at the input and find 
>>out the voltage at which it switch from 0->1 and 1->0. According to me 
>>I have only one value at one process, voltage temp. How I can extract 
>>two value for vinh and vinl for one process, voltage and temp.
>>
>>Regards
>>Akhilesh
>>
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Received on Mon Feb 20 04:02:36 2006

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