How does a ring oscillator work?

[sridhara]

hi friends...
i am confused how a ring oscillator....works....how is the voltage controlling mechanism achieved there....or in simple words


how does a ring vco works.....

 

[tycheng]

doubt in ring vco

You can control the delay time of an inverter by changing the static supply current of inverter.
The oscillation frequency of ring oscillator is the frequency point that meets phase delay=0 and gain >0