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Simulators >> Circuit Simulators >> Parametric sweep in spectre
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Message started by smarty on Sep 5^th, 2008, 3:28am

Title: Parametric sweep in spectre
Post by smarty on Sep 5^th, 2008, 3:28am

Hi All,
�Can anyone help me out on the following issue.

I am using a PWL whose pulse width is modelled depending on temperature. So if temperature increases the the high perion of the pulse increase.
I used a variable temp to define it. and if I do a parametric sweep of temp for 2 steps say 25 and 75. I see the block output not performing as desired.

If I run for the two steps seperately in analog artise, it works. Also when I change the variable from temp to any other name the block works as desired.

But I need to model using temp and can anyone suggesthow can I do that.

Thanks and Regards,
SBR

Title: Re: Parametric sweep in spectre
Post by sheldon on Oct 3^rd, 2008, 9:58am

Smarty,

� Can you implement the PWL in VerilogA? VerilogA can
access the simulation temperature and you can write your
equation for the pulse width using that value. Or, I think the
there is a keyword for temperature, temp(?) so you can write
expressions with temperature dependency for the PWL. If you
look in the variable list for parametric analysis, the temperature
keyword is listed.

� � � � � � � � � � � � � � � � � � � � � � � � � � � � Best Regards,

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � �Sheldon
� � � � � � � � � � � �

Title: Re: Parametric sweep in spectre
Post by smarty on Oct 4^th, 2008, 11:22am

Hi Sheldon,
Thanks for your inputs. I was able to successfully implement the same using the temp variable.

I assigned the input as a variable temp and swept the temp for different values and I was getting the desired results.

Best Regards,
SBR