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VCO phase noise is too bad, need to improve it

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Herang Sayo

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Hi,
I am designing a VCO in Cadence, operating at 2.4GHz, its phase noise is -47.4 dBc/Hz. How can I improve it?
 

Hi,
What type of vco you are designing?
 

Hi,
I am designing an LC-VCO, using the pMOS transistors for the current mirroring.
 

there is a good table in tiebout's book:
lowphasenoise.png
Hope, this will help you.
 
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