Hi,

I'm trying to specify a frequency dependent resistance (an approximation of the skin effect).

I have a parameters include file, and need to specify the frequency within an expression (in curly brackets) as follows:

S3_skin_tu1 = {PI*PWR(S3_r_tu1-SQRT(2*S3_res_tu1/(2*PI*FREQUENCY*u_Cu)),2)}

However, PSpice does not understand 'FREQUENCY' (nor 'FREQ' or anything else I've tried). I've not been able to find anything in the documentation.

Does anyone know of a way to use AC frequency in an expression?

Any suggestions will be gratefully received!

Regards,

Nick