jlee
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Thank you, chenyan and Rael.
Also, I have noticed that the parasitic cap on the source of negative gm transistors has impact on the filtering effect.
Actually, 2nd harmonic filter can be used to improve phase noise in 1/f^3 regiion. But I found it is really sensitive to the choke inductance and cap on that node.
Rael, could you please give some comments on how to design the 2nd harmonic filter based on 1/f^3 phase noise improvement, especially how to choose the choke inductance?
Thanks
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