I wish to run optimization for getting the maximum frequency tuning range of a VCO. This means that i need two frequencies corresponding to Vtune=0 V and Vtune=1.2V. (Vtune is the voltage applied to the varactors)
The optimization should then take the difference of the two frequencies and maximize it based on the parameters given.
To achieve this, i added two tests providing the two frequencies and naming them Freq0 and Freq1 but ADE-GXL does not allow to write an expression including outputs from two different tests.
Is there a way to write an expression like Freq1-Freq0 and then add a specification to maximize it? Please see attached screenshot for reference.
Kind help from the Cadence officials will be appreciated. Any other method which i can do?