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VCO Design in ADS

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barisbaris

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* Hello I need your help about attached VCO design question, could you help me about solution.
* As an another question, I could not find the BJT in the ADS library, is it because of me or should I import it in the library, if so I could not find any model in internet to import.

I am very appreciate about your help, my friends.
 

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BigBoss

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-The models are here, unrar the file which you're interested in and install as
C:\Program Files\Keysight\<ADS Version>\oalibs\componentLib
Also, RF Component Manufacturers have their own Design Kits or Libraries, download and install them accordingly .
-s-parameters analysis is not used in oscillator desings because oscillators are chaotic and strongly nonlinear devices. Read more about how to design and to implement techniques.
-Oscillators are not 2-Port devices, they are autonomous systems and analysis of those circuits needs heavily experiences and knowledge.
Typical VCO analysis set-up is shown below.
1641141337687.png
 
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