I saw you setting the PHI to 90 in your example. I performed more tests to study this device frequency characteristic.
For PHI, my major observation and advise are
- PHI is limited between 0 to 90 degree
- Be very careful PHI=0. Like some Qspice instance parameter, setting it to 0 may force a default value or something else. My test suggests setting PHI=0 (or negative number) will force PHI to default, which is 60 degree. To test PHI at 0, just put a very small number. PHI>90 will limit to 90.
- PHI control frequency of a pole/zero pair, but how far this pole/zero apart, user seems have no controllability (always two decades).
If you find anything not following these, let me know and I will correct my understand.
