variable voltage capacitor

[fapa]

Hello,

I would like to model a  variable voltage capacitor in multisim with:

C(V) = Ca + Cb Tanh(V / Cd - Cd)

where, Ca, Cb and Cd are know constant capacitances. 

Any suggestions?

Thank you very much,

Fabio 

[derekdb]

Hi Fabio,

I think the Voltage_Controlled_Capacitor_Virtual is what you need for that end.

[derekdb]

Oh, you might need Non-linear_Dependent_Source to accomplish the calculation.