geozog86
Member level 3
Hello!
In cadence simulations, i got the basic components that create the phase noise of my oscillator:
-the biasing block seems to be the most responsible one (45% of the noise) , but how does that make any sense? It's a PTAT generator from which all currents are mirrored, but it's not in one of the crucial nodes for the oscillation frequency.
-some transistors in the biasing current source are responsible via their id and some via their fn. What does that imply?
-how can i improve the phase noise? As a general approach? I can only guess higher current? Is there any other general approach?
Thx for the help
In cadence simulations, i got the basic components that create the phase noise of my oscillator:
-the biasing block seems to be the most responsible one (45% of the noise) , but how does that make any sense? It's a PTAT generator from which all currents are mirrored, but it's not in one of the crucial nodes for the oscillation frequency.
-some transistors in the biasing current source are responsible via their id and some via their fn. What does that imply?
-how can i improve the phase noise? As a general approach? I can only guess higher current? Is there any other general approach?
Thx for the help