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Simulators >> Circuit Simulators >> Plotting OIP3 vs IIP3 using Hspice+AvanWaves
https://designers-guide.org/forum/YaBB.pl?num=1122269838

Message started by Syahrizal on Jul 24^th, 2005, 10:37pm

Title: Plotting OIP3 vs IIP3 using Hspice+AvanWaves
Post by Syahrizal on Jul 24^th, 2005, 10:37pm

Dear all,

Does anyone here uses HSPICE? I have spent a lot of time looking into plotting OIP3 vs IIP3 to find 1db-compression point and third order intercept point using the normal HSPICE. There are no manual available for such plot, but I believe there must be a way to do it. Just wondering if anyone has come across it and successfully solve it. Thanks a lot

Title: Re: Plotting OIP3 vs IIP3 using Hspice+AvanWaves
Post by spiceoracle on Aug 10^th, 2005, 12:48pm

Plotting OIP3 and IIP3 using HSPICE is not possible.

HSPICE will not show non-linear effects such as compression points or intercept points. If you want to simulate non-linear effects, you will need to use HSPICE RF. You can then measure OIP3 and IIP3 using CosmosScope.

Title: Re: Plotting OIP3 vs IIP3 using Hspice+AvanWaves
Post by Geoffrey_Coram on Aug 18^th, 2005, 10:38am

Spiceoracle -
Couldn't you do this by running a bunch of transient analyses and computing FFTs? I agree that an RF simulator would be better, though.

Title: Re: Plotting OIP3 vs IIP3 using Hspice+AvanWaves
Post by spiceoracle on Sep 8^th, 2005, 11:14am

In theory, running a bunch of transient analyses and computing FFTs should work. I've never tried this and I really don't know of anyone who has successfully used this method.