hi , i have done PSS analysis for VCO . but it is giving error messege that " pss analysis doesn't converge . what could be the error ? i hv checked the ckt for different tstab , but it does not work. should i increase maxperiod?
Before you run the PSS, maybe you would like to run a transient analysis to check how long does it take for your oscillator to start oscillating. From this, you can key in the tstab. If the same problem occured, maybe you should change the tolerance options under simulator options to a finer resolution. This may help in your convergence issue.