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Firstly , I use the PSS plus PhaseNoise to check the output noise of the PFD+CP+LPF , and I can get the (dB)
And then I choose the output item is "phase noise " but not the "output noise "
As you know the VCO phase noise output can get the dBc/Hz
But as I comment , I am confused whether the...
in this CPPSIM tool , this part PFD+CP+LPF (DETECTOR) require the dBc/Hz ( X/Y ) but not the V^2/Hz (dB) , I am confused how to transfer the simulation output noise to phase noise ???
---------- Post added at 04:25 ---------- Previous post was at 04:22 ----------
the vco PN is easy to get ...
Of course, electrons is more mobile than the holes whatever in n type substrate or p type substrate.
If it is the reason, what is the different between make a PMOS in a Nwell under the P_sub condition and make a PMOS in the N_sub?
Hello, I am a new. And I am a little puzzleed by this question
Can anybody tell me why the modern process chooseed P_sub.
And what is worry with N_sub?
Thank you very much!
That is a good suggestion.
And if you have to use 45 degrees. You'd better make sure that the every grid point which is by passed is on the grid! because, most off-grid problem is cause by un 0 degress.
the art of analog layout answer
agree!
Reading a book , then work with layout . And you will meet some questions. Find the answer in the book, do the layout again.
I think it wiil be a better way!
You'd better do not to changer the grid size.
because the grid size have relation to the MASK building.
if you changed the grid size, maybe,the software tell you that the layout is OK! But the process engineer will tell you that the gds has problem! And they can't make the right MASK.(The grid...
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