Best not-LC-type oscillator @20MHz

[jugemu1234]

Hi there,

Apparently there are so many kinds of known oscillator structure that does not expect LC-tank. I'd like to ask you what fully on-chip oscillator topology you think best around a few tens of MHz in terms of jitter/power/area/psrr. RC oscillator? or n-stage ring oscillator? and Why?

Thanks for kind discussion in advance

 

[karesz]

Hi,
I think - for that isa ring oscillator invented...
K.

 

[LvW]

Hi there,
Apparently there are so many kinds of known oscillator structure that does not expect LC-tank. I'd like to ask you what fully on-chip oscillator topology you think best around a few tens of MHz in terms of jitter/power/area/psrr. RC oscillator? or n-stage ring oscillator? and Why?
Thanks for kind discussion in advance

Some important specifications are missing:
*What kind of signal do you want ?
*Specific quality requirements?
*Any external frequency tuning/adjustment required?