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Design >> RF Design >> Choosing inductor for low power
https://designers-guide.org/forum/YaBB.pl?num=1361131713

Message started by mixed_signal on Feb 17^th, 2013, 12:08pm

Title: Choosing inductor for low power
Post by mixed_signal on Feb 17^th, 2013, 12:08pm

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