- 23rd October 2008, 20:38 #1

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## How to plot CV curve for a MOSCAP in Cadence?

Hi, How to plot CV curve for an MOSCAP in cadence?

In DC analysis I saw some "op" and "opt" option in Calculator. I chose the Cgg option to plot Vs Vgs. But its showing only one Value. I want to plot the complete CV Curve, how it can be possible??

- 23rd October 2008, 20:38

- 26th October 2008, 07:47 #2

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## how to compare cv curves

SPICE can, i am not sure about cadence, refer to the manual.

Best regards.

ELE

- 26th October 2008, 07:47

- 26th October 2008, 10:35 #3

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## spice cv curve

you can simulate in ADE, sweep the gate voltage as a parameter!

- 26th October 2008, 10:35

- 26th October 2008, 15:47 #4

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## plot cv curve

I did In CADENCE. I swept the gate voltage and shorted the Drain, Source and Bulk terminal to GND. I did the DC analysis. Now I want to plot the CV Curve. But I don't know how to do it??

Please can anybody tell me the way how to do it in CADENCE???

- 29th May 2011, 00:30 #5

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- 30th May 2011, 19:52 #6

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## Re: How to plot CV curve for a MOSCAP in Cadence?

This link is quite helpful:

The Designer's Guide Community Forum - Plot the CV curve using the spectre

So, set the frequency fixed and sweep the DC voltage instead (i.e., in the AC analysis choose Sweep Variable to be Design Variable instead, where you have your DC value as a parameter).

I must, however, say that I haven't used it frequently, but it seemed to work pretty well for my test setup.