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stb Ocean/Skill examples

dlbro

Does anyone have any examples of using the stability analysis (stb) Sprectre tool in Ocean/Skill? I've done extensive scripting in transient, AC, DC, noise, pnoise, etc... but this is the first time I've tried stb. Running stb is easy, I've seen some stuff on how to do phase margin and gain margin, but how do I plot the gain and the phase? I've searched Cadence and Source link and the internet to no avail. Is there any equivalent to VT(), VF(), VS() for stb?

Thanks in advance,

dlb

Parents

  • The best way to get the expressions to use for plotting gain and phase (and indeed the gain and phase margin) is to set up the stb analysis in ADE, and then (after simulating) use the Results->Direct Plot->Main Form, and select what you want - selecting "add to outputs". Then in the ADE outputs pane, double click on the relevant output (created by direct plot) and cut and paste the SKILL expression (or save the OCEAN script from ADE and you'll get the BLOCKED EXPRESSION.

    This is what I tend to do, particularly with some of the RF measurements, although it equally well applies to stability analysis - saves me trying to figure it out myself or looking throught the documentation!

    Regards,

    Andrew.

Reply

  • The best way to get the expressions to use for plotting gain and phase (and indeed the gain and phase margin) is to set up the stb analysis in ADE, and then (after simulating) use the Results->Direct Plot->Main Form, and select what you want - selecting "add to outputs". Then in the ADE outputs pane, double click on the relevant output (created by direct plot) and cut and paste the SKILL expression (or save the OCEAN script from ADE and you'll get the BLOCKED EXPRESSION.

    This is what I tend to do, particularly with some of the RF measurements, although it equally well applies to stability analysis - saves me trying to figure it out myself or looking throught the documentation!

    Regards,

    Andrew.

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