how to model a non-linear resistance in Hspice

[lokesh garg]

I want to model a non-linear resistance (NDR) as a voltage-controlled resistor. The problem is the current through the resistance is depends upon potential difference across the pair of nodes between which it is connected.

 

[erikl]

I want to model a non-linear resistance (NDR) as a voltage-controlled resistor.

It should be possible to establish the voltage dependence simply via a variable, e.g.
Vctrl = 5
Rx n1 n2 ('n*Vctrl')

The problem is the current through the resistance .. depends upon potential difference across the pair of nodes between which it is connected.

This is standard for every resistor!

 

[lokesh garg]

actually we do not have the voltage values of the nodes to start with. I only have the current-voltage characteristics of a resistor. i have to insert this I-V characteristics in my resistor.....
I am attaching the I-V char. curve for your reference....

 

[keith1200rs]

See my reply here:



Keith.