davidwong
Member level 4
When I use ideal inductor(with 5ohm series resistor), and ideal capactor.
LC VCO can be oscillated
But when I use te process kit to simulate my LC VCO.
I find that the VCO can not be oscillated.
I think it may be due to the parasitic component in varactor and inductor.
and the gm of the NMOS transistor is too low at high freq.
How can I simulate gm vs freq in LC VCO?
Note : large signal gm is large enough for oscillating.
LC VCO can be oscillated
But when I use te process kit to simulate my LC VCO.
I find that the VCO can not be oscillated.
I think it may be due to the parasitic component in varactor and inductor.
and the gm of the NMOS transistor is too low at high freq.
How can I simulate gm vs freq in LC VCO?
Note : large signal gm is large enough for oscillating.