AG wrote, on 09/02/08 08:19:
> On Sep 1, 11:54 pm, Riad KACED <riad.ka...@[EMAIL PROTECTED]
> wrote:
>> Hi,
>>
>> I honestly don't know how to define a periodicity for the 'analogLib/
>> vexp' voltage source. I'm just wondering whether it is possible. I
>> went through the Analog Library Reference Guide do***ent but it was
>> not that much helpful for this case. Hope some experts will set us
>> straight on this.
>>
>> Meanwhile, I'm seeing 2 potential solutions off the top of my head :
>>
>> 1. Write a Verilog-A source. I think I've seen some examples on the
>> Accelera/Designer's Guide web sites, can't remember :-(
>> 2. you can write a piece of skill/perl/C/Matlab... to generate a time-
>> limited waveform into a file that you could use to feed the vpwlf
>> source.
>>
>> Cheers,
>> Riad.
>
>
> Riad,
> Thanks for your suggestions.
> Yeah, the do***entation doesn't help much. Seems like its not
> possible. But, I don't understand why not.
> I'll check into #1.
> #2 did occur to me but I'll try it as a last resort :-(.
> Thanks once again.
>
> Regards,
> Anand
>
I don't see "exp" sources being used very often, in practice. I checked,
and it
seems that spectre's vsource does not sup****t "period" on a source with
type=exp. I can't see any reason why it shouldn't be possible, except that
it
would probably be necessary to ensure you don't get an abrupt transition
at the
start of a new period (given that it will never actually reach the final
value
with an exponential source).
You should contact Cadence sup****t, and an enhancement request could be
filed on
your behalf.
Regards,
Andrew.
--
Andrew Beckett
Senior Solution Architect - Cadence Design Systems Ltd (UK)
|
