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Cadence/Virtuoso Plot Voltage Sweep

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InspectorGadget

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I'm doing simulations on a VCO using Cadence at the moment (relative n00b to Cadence). I've got my circuit functioning and have a plot of the transient performance of the circuit for a set control voltage.

What I'd like to do is sweep my control voltage and generate a plot of voltage vs. frequency.
At the moment I have the equation to calculate my frequency (for fixed voltage) and it works fine. I just need to figure out how to now sweep the voltage and generate my plot.

Hope my question is clear. Any help greatly appreciated! :smile:
 

Ok, I've figured out that what I need is a parametric analysis and I know how to run this. What I don't know is a function to plot frequency versus each voltage stepped in the PA. Also, I think I'll need some way of not calculating the frequency for each step until after a so many nano seconds to allow for settling of my oscillator.
 

InspectorGadget said:
Ok, I've figured out that what I need is a parametric analysis and I know how to run this. What I don't know is a function to plot frequency versus each voltage stepped in the PA. Also, I think I'll need some way of not calculating the frequency for each step until after a so many nano seconds to allow for settling of my oscillator.
Click to expand...

Hi,
Transient simulation and then running a parametric sweep will be very slow. What you can do is run a PSS analysis. See the following pdf.. Slides 22 and 23. **broken link removed**
 

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