go_horns
Newbie level 1
Hi all, after some reading, most of the recent literature on mm-wave PLL have focused on circuit techniques that may either extend the VCO tuning range, reduce PFD spurs, and so on. While they have been helpful, I want to ask if there is significant or key elements in mm-wave PLL design on the system/architectural level that is different from conventional design at lower frequencies?
Most of the paper don't really tell you how they have arrived at the architectural choice of a type-II, 3rd order charge pump (I mean in mm-wave literature), so it gives me the impression that all the important stuff is at the transistor level, whereas system design approach is similar to before.
Stability issues? reference frequency choice (divider ratio?) parasitics at mm-wave? etc....
Thanks!
Most of the paper don't really tell you how they have arrived at the architectural choice of a type-II, 3rd order charge pump (I mean in mm-wave literature), so it gives me the impression that all the important stuff is at the transistor level, whereas system design approach is similar to before.
Stability issues? reference frequency choice (divider ratio?) parasitics at mm-wave? etc....
Thanks!