Ring Oscillator gain? or Kvco?

[dravi99]

Hi ,

I am working on .13um process. I designed a single ended ring oscillator. I need to know how to calc. the gain i.e. Kvco.?? At supply voltage of 1.2V this VCO runs at 1Ghz, at 2V this goes till 2Ghz. Now how do I calc Kvco. Any help will be great. If I am targetting 1GHZ/1V then what i am supposed to do?

This is the first time I am doing a PLL. What are the consideration that I need to make for a diffferntial ring osc. topology.

Any help will be appreciated.

Thanks in Advance.

 

[jecyhale]

Message is unavailable.

 

[smoked]

Kvco = (f1 - f0)/(v1-v0) in units GHz/V

For your design Kvco = (2-1)/(2-1.2) = 1.25 GHz/V