choosing inductor for low power consumption of vco

[analog_ambi]

Hi,
I have two inductors:
L1=2nH Q1=15 Rp1 (Parallel)=450 ohm

L2=4nH Q=11 Rp2(Parallel)=500 ohm

where Q=Rp/Lw

If I use them in VCO I want to know which one will provide low power consumption. I think Rp2 is greater and hence less -gm will be required to start up and hence inductor 2 will be low power consuming.


For better phase noise I think 1 is better since Q1>Q2

 

[BradtheRad]

You are correct. A greater Henry value is associated with longer time constant, lower frequency, and lower current.