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QVCO designing

VIVEK1729

hi,

I am trying to make QVCO @5GHz in 180nm but i am  not getting the required sine wave, could you please suggest me the model no. of capacitor and Inductor which can be used in RF region. I also tried this in 130nm but my result are not sine wave due to which oscillation are not getting sustained i am sending you one image where transient response of my design can be seen, as you will see lower part of the wave is getting small 'kink'. Please help me out. 

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  • Andrew Beckett

    Nobody is going to be able to help you if they don't know which technology  you are using or what your circuit looks like. Even then there are probably better forums (e.g. Designer's Guide) to answer detailed design-related questions (but you'll need to make sure you follow the forum guidelines there too and provide enough info for somebody to stand some chance of answering your question).

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  • Andrew Beckett

    Nobody is going to be able to help you if they don't know which technology  you are using or what your circuit looks like. Even then there are probably better forums (e.g. Designer's Guide) to answer detailed design-related questions (but you'll need to make sure you follow the forum guidelines there too and provide enough info for somebody to stand some chance of answering your question).

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