resolution of digitally controlled oscillator in PLL

[tv123]

What is resolution of a dco? please explain

 

[dick_freebird]

"The" resolution? 1/2^N (control bits) times whatever
the tuning range is, more or less.

These used to be called NCO, numerically controlled
oscillator, maybe you will find more references using
that.

 

[dshoter13]

Basically is what @dick_freebird said, plus the fact that almost all DCO's employ sigma-deltas to lower the frequency's granularity. For more details I would suggest you to take a look at PhD thesis of Professor Robert Bogdan Staszewski.