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Create nonlinear capacitor model

DanielB021

Hi!

I am fairly new to spice modeling and also PSpice.

I am trying to understand how to create my own component gor use in Orcad Capture 22.

What I am trying to achieve is basically a capacitor with a nonlinear parallel resistance. The resistance is high at low voltages (about 1-6V), then lineararly decrease up to maybe 50V. After 50V it is flat. 

What I would like to also define is the capacitance based on parameters thickness and diameter.

Are there any usable tutorials on how to do this in Orcad Capture 22?

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