a question about oscillator

[incol]

If I design a ring oscillator that is independent of power supply and temperature, is it that only I can choose the bandgap reference in my circuit? is there another method?
thanks!! [/code]

 

[rfsystem]

If you choose a LC as frequency determine there is no first order dependence on supply.

A tricky idea is if you being forced to use a ringoscillator to use the supply as a VCO regulation input. So the supply is then of minor importance.

 

[incol]

If you choose a LC as frequency determine there is no first order dependence on supply.

A tricky idea is if you being forced to use a ringoscillator to use the supply as a VCO regulation input. So the supply is then of minor importance.

is bandgap reference better, or LC batter?

 

[rfsystem]

LC is better regarding phase noise and supply sensitivity.

But the frequency range is not more than 10-30%. Inductors are very large below 2GHz.