Why do neither of these oscillate ?
Well, there is an optimizer which will start with thinking about what two NOTs can be replaced with...
Thanks Bob, once again I have to remember there is an extra
agent in the room erasing my thoughts.
Would be nice if each component had a property to "optimize or
not optimize, that is the question", but then I could envision net
synthesis times reaching into months.
So Works, but questions still more...
I did a 3 delay ring, basically got a pretty nice sinewave at 64 Mhz
on a single pin. So PSOC is a RF generator, whoda thunk .....?
Using 1 Ghz DSO for measurements. Lots of undershoot, ~ 1.2V,
but no overshoot. -030 board.
I plan on trying paralleling pins to see if that helps.
I do see a number of questions in your capture, especially no phase
difference between 2 outputs...........very low Fosc............
I also did a XOR doubler off ring, actually got some output
at 124 Mhz, but only a volt pk-pk swing. Board and layout
would have contributed to this as well.
Normally on a wafer there is one or more ET test sites to help monitor
process. And as part of that test site is a ring oscillator to keep track
of what AC performance.