Hi everybody,
I am designing LNA whose testbench uses some S-parameter files for off-chip components from vendors(L,C, balun...). the warning arises as in the logfile below
I think that it is due to the frequency range in S-param files does not go down to 0 frequency point or even not close to such the lower point (10 Mhz or 1Mhz..) . It is tough to change it without each component measurement..
Is that affect the accuracy of frequency response and other merits at other frequencies ( in terms of gain, noise, and oip3....).. I am aware that a violated passivity of S-param can possibly impact on stability and causality at a single frequency point (correct me if I'm wrong).
Thanks,
Binh Ngo