Re: Proposal for two additional environment parameter functions

Hi Geoffrey,
well yes that doesn't make a lot of sense to do that. But I can do similar 
strange things like:
V(out) <+ analysis("ac");

I use $freq, similar to how I use $abstime, mostly in an 'if' condition.
   if($freq > 1M) ... else

I have also used it in $fwrite() where if I am writing out noise_table values 
to a file I can also write out the freq that they represented.

I guess it could raise an error if used in anything other than a small signal 
analysis, I don't really mind either way.

I also noticed that in the LRM in the "VPI routine definitions" section we have 
a VPI routine: vpi_get_analog_freq() and thought it was useful to also have a 
behavioural statement in $freq to do a similar thing.

Cheers...
Dave

Geoffrey.Coram wrote:
> David Miller wrote:
>> Hello,
>> I would like to propose two new environment parameter functions for 
>> LRM 2.3
>>
>> 1. $freq
>> Similar to $abstime, this function will simply return the current 
>> frequency
>> when doing a small-signal analysis.
>>
>> [LRM TEXT]
>> $freq shall return the current frequency used of a small-signal 
>> analysis. The
>> function shall return zero (0) during DC or transient analysis.
> 
> Does this make sense?  What if I did:
> 
> V(out) <+ $freq;
> 
> Then, during dc, I get zero, but during the ac analysis, I get something 
> else.
> 
> What are you really trying to do with this function?
> 
> -Geoffrey
> 

-- 
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-- David Miller
-- Design Technology (Austin)
-- Freescale Semiconductor
-- Ph : 512 996-7377 Fax: x7755
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