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Plotting a Graph in cadence with different axis variables DC-Analysis Design variable

r.mirtaji

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I implemented a cascade current mirror circuit as shown blow.
Screenshot.png
And I want to plot the output voltage Vout relative to the changes of input current (0<Iref<800uA) . I use DC-Analysis>Design-variable>start=0 / stop=800u then run the simulation
x-axis of chart in term of voltage and y-axis of chart in term of Iref
2.png

how can I change x-axis=Iref and y-axis=Vout

Like the figure below
3d.png
 

BigBoss

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At first graph, you're changing Iref so the variable Iref is used as X-axis.
But at second graph, the variable is Voltage.. So there is a difference.
 

dick_freebird

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Right-click on the axis and you should be able to
choose any saved waveform or defined Calculator
expression, or the default analysis sweep.
 

Dominik Przyborowski

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There is a function waveVsWave allowing to plot data in any desired way.
However, to achieve output characteristic of your current source, you should sweep V1 voltage not input current.
And one more remark. You are using single Idc to bias two branches - it is bad idea.
 

dick_freebird

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Looks like latest version of Cadence has changed the
UI plenty. Now I find that you have to still right-click
the X axis, then "Y vs Y", then pick your X waveform.
 

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