Hi, I found two simulations models IBIS and S-Parameters. What is the difference between them ? I know they are different then SPICE which we use to simulate the analog ICs in circuit but if we talk about IBIS and S-Parameters then how do we differentiate them ? I know that IBIS stands for "Input/output Buffer Information Specification" and is used primary for digital IC switching or digital I/O modelling. What are S-Parameters ? and how they differ then IBIS models ?

 

Don't know about IBIS, but S-parameters, also known as "scattering," parameters, are used in RF circuits, particularly in the VHF (Very High Frequency) domain and above. They are complex numbers describing both magnitude and phase. They are often used in conjunction with a Smith Chart. See the following article for additional information.

https://en.wikipedia.org/wiki/Scattering_parameters