hhq414
Member level 1
Hi, all
As we know, we can predict VCO phase noise using hajimiri's LTV model. And I have read his papers, where he defined a useful function called ISF to calculate phase noise. But I still don't know how to get the ISF from simulation. Do you obtain it by PSS or by TRAN simulation? As I know, the same VCO may start up at different time when you do TRAN simulation. How do you know when is the correct time in one period to inject current (you have to sweep time in one period)? Do you have any material tell me how to obtain ISF step by step?
As we know, we can predict VCO phase noise using hajimiri's LTV model. And I have read his papers, where he defined a useful function called ISF to calculate phase noise. But I still don't know how to get the ISF from simulation. Do you obtain it by PSS or by TRAN simulation? As I know, the same VCO may start up at different time when you do TRAN simulation. How do you know when is the correct time in one period to inject current (you have to sweep time in one period)? Do you have any material tell me how to obtain ISF step by step?
