Re: Simulation for LNA IP3 and 1 dB com. point using Spectre
You should use PSS analysis in SpectreRF with psin source while Amp(dBm) is changed in convenient limits. In this case you do SPSS ( Swept periodic Steady State ) analysis.
When you finished the simulation, SpectreRF automatically will introduce a choise for IPn and Compression points ( either output and output ) .
For LNa's , "Input IPn points ( such as IP3 and IP5 ) are important.
You may select the psin output port and find the behaviour.
Look at SpectreRF Simulation SPSS in User Manual ..