plotting in cadence
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plotting in cadence

 
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Uncle Ezra
Guest
Posted: Fri Dec 03, 2004 10:37 am    Post subject: plotting in cadence Reply with quote
Hi,

I am sweeping the input Vgs and would like to plot Vgs-Vt on the
x-axis instead of only Vgs. How do I do this in Cadence?

Thanks

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Guest
Posted: Mon Dec 06, 2004 3:20 pm    Post subject: Re: plotting in cadence Reply with quote
Hi,

Not sure how your method work, but i used the lshift function to shift
the x-axis (Vgs) by -Vth using OP function. Now, if I wanted to times
by a constant then I am not sure how to do it. Any ideas? Maybe
interchange y and x axis but not sure how to it either.

Cheers

Uncle Ezra wrote:
Quote:
Hi,

I am sweeping the input Vgs and would like to plot Vgs-Vt on the
x-axis instead of only Vgs. How do I do this in Cadence?

Thanks
Back to top
fogh
Guest
Posted: Tue Dec 14, 2004 11:11 am    Post subject: Re: plotting in cadence Reply with quote
it is explained in the last chapter of the awv manual, if I remember right.
jim_wang22@yahoo.com wrote:
Quote:
Hi,

Not sure how your method work, but i used the lshift function to shift
the x-axis (Vgs) by -Vth using OP function. Now, if I wanted to times
by a constant then I am not sure how to do it. Any ideas? Maybe
interchange y and x axis but not sure how to it either.

Cheers

Uncle Ezra wrote:

Hi,

I am sweeping the input Vgs and would like to plot Vgs-Vt on the
x-axis instead of only Vgs. How do I do this in Cadence?

Thanks



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Andrew Beckett
Guest
Posted: Tue Dec 14, 2004 11:38 am    Post subject: Re: plotting in cadence Reply with quote
In the old waveform tool, it's just a matter of plotting both the signal you
want to plot, and the expression for the new X axis (calculate that using the
calculator). Once you have both these signals plotted (against the normal Vgs
x-axis), double-click on the x-axis, and you can then change the variable for
the x-axis to be something other than the independent variable - i.e. one of
the plotted signals.

In wavescan you can do something similar - just can't remember the exact
details off the top of my head.

Regards,

Andrew.


On 2 Dec 2004 21:37:50 -0800, jim_wang22@yahoo.com (Uncle Ezra) wrote:

Quote:
Hi,

I am sweeping the input Vgs and would like to plot Vgs-Vt on the
x-axis instead of only Vgs. How do I do this in Cadence?

Thanks
Back to top
 
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