RE: [IBIS-Users] about the keyword [frequency] of ICM 1.1

Hi Bob,
   Thank you for the explanation! 

Best regards
Xuefeng

-----Original Message-----
From: Bob Ross [mailto:bob@teraspeed.com] 
Sent: 2006年11月9日 8:04
To: Xuefeng Chen
Cc: ibis@eda-stds.org; ibis-users@eda.org
Subject: Re: [IBIS-Users] about the keyword [frequency] of ICM 1.1

Hi Xuefeng:

We intended that if there the Matrix uses the keyword
[Frequency], then all the matricies specified including
the [Resistance Matrix] have data sets at each of the
specified frequencies.

This keeps all of the matrix data aligned and explicitly
specified for each frequency.  We chose to be inflexable
and not support arbitraily different frequencies for
different matrices or a single matrix with no frequency
variation when other matrices have frequency variations.
Even resistance and conductance matrix elements can vary
with frequency.

So the error message is correct and complies with the
the specification.

Best Regards,
Bob

Xuefeng Chen wrote:
> Hi Expert,
> 
>    I found for frequency dependent Matrix where [Frequency] is omitted 
> only in [Resistance Matrix](like Matrix Example in IIRD2.3), ICMCHK1 
> will report bellow error.
> 
>    ERROR:'[Resistance Matrix]' does not have the same number of 
> frequencies as '[Inductance Matrix]'
> 
>    
> 
>       ICM1.1 spec. tell us that ?If a matrix keyword, such as 
> [Resistance Matrix] etc., is used
> 
> in combination with one or more [Frequency] keyword data sets, all other 
> matrix keywords, if present and consisting of non-zero 
> frequency-dependent data, must contain [Frequency] data sets at the same 
> frequency points.?
> 
>  
> 
>    So is it a bug?
> 
>    Thanks for any input!
> 
>  
> 
> Best regards
> 
> Xuefeng
> 


-- 
Bob Ross
Teraspeed Consulting Group LLC     Teraspeed Labs
121 North River Drive              13610 SW Harness Lane
Narragansett, RI 02882             Beaverton, OR 97008
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http://www.teraspeed.com           503-246-8048 Direct
bob@teraspeed.com

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