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Modeling >> Behavioral Models >> Model optocoupler NSL-32SR3
https://designers-guide.org/forum/YaBB.pl?num=1562621307

Message started by Leonardo on Jul 8^th, 2019, 2:28pm

Title: Model optocoupler NSL-32SR3
Post by Leonardo on Jul 8^th, 2019, 2:28pm

Hi all

This is my first post in the forum.
I need to model an optocoupler (NSL-32SR3) that reduces its resistance with increasing current. I was able to deduce the mathematical equation from the curve using Excel.
Equation : R = 293,01 * i ^(-0,593)

But since I have little experience in Verilog I do not know how to create an expression that converts the input current to output resistance in the Verilog language.

Below is datasheet´s optocoupler.

Could someone give me some tips?

Thx
Leonardo

Title: Re: Model optocoupler NSL-32SR3
Post by Geoffrey_Coram on Jul 12^th, 2019, 7:24am

You should look on the paged linked to the "Verilog-AMS" tab above and find a resistor or a controlled source model and learn the basics of writing a Verilog-A model. Start with a simple linear resistor but rename the module to nsl_32sr3 and give it the pin names you want.