lc ring oscillator

Hi all
Did any of you have experience on ring oscillator VCO design? I want to push operation frequency of ring oscillator to over 10Ghz for 0.13 technology, but simulation have problem, did anyone have experience on this? Is it possible to generate a ring oscillator VCO for over 10Ghz using 0.13 technology? I also searched online paper, most of the works focus on LC oscillator instead of ring oscillator? If you happened to know some papers, please let me know too.
Thanks

Hi liletian,

What kind of Ring osc ?

any kind of ring oscillator? My natural mean is inverter ring oscillator, but as long as it is ring oscillator, it is ok? Do you know source about it?
Thanks

Try to use delay cells.

can you give more details?
thanks

Google it or search here using for search the word delay cell

10 GHz is too high to use ring oscillator.
Why not choose the LC VCO.
Do you need a large tuning range?

Another thing is that the phase noise of a ring oscillator is bad. LC is indeed better, but it depends on your technology whether this is feasible.