daisyinfall
Junior Member level 3

cascode frequency compensation
As cascode frequency compensation will bring higher PSRR,I apply it in a telecascode two-stage OPamps. but I find: as the compensation capicitor increasing,the phase curve and the gain curve will be distored. Although I can reach 60 degree phase margin,the gain margin will not be enough.You known,the gain margin is just 5 db......
WHY?
And what can i do to get enough gain margin?
Thanks!
Regards!
As cascode frequency compensation will bring higher PSRR,I apply it in a telecascode two-stage OPamps. but I find: as the compensation capicitor increasing,the phase curve and the gain curve will be distored. Although I can reach 60 degree phase margin,the gain margin will not be enough.You known,the gain margin is just 5 db......
WHY?
And what can i do to get enough gain margin?
Thanks!
Regards!