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 Plotting IMD3 Terms in Polar Form 

Last post Mon, May 21 2012 10:56 AM by SeriousTyro. 0 replies.
Started by SeriousTyro 21 May 2012 10:56 AM. Topic has 0 replies.
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  • Mon, May 21 2012 10:56 AM

    • SeriousTyro
    • Not Ranked
    • Joined on Mon, May 21 2012
    • Arcadia, CA
    • Posts 4
    • Points 50
    Plotting IMD3 Terms in Polar Form Reply

    Hi all,

    I am referencing this paper:

    Modified Derivative Superposition, Aparin and Larson 

    http://course.ee.ust.hk/elec528/Notes/DerivativeSuperpositionLNA-%20Larson.pdf

     

    I am having trouble getting a plot like in Figure 7 where it displays the IMD3 components.

    I can determine the ordered nonlinearity terms from (3) easily using a dc sweep of Vgs and taking the deriative. But how would I only display this at a certain Vgs? For example I have the calculator function deriv(deriv(deriv(Id)))/6 but what If I want it at a certain Vgs like Vgs=0.5?

    Assuming I can do this, can I also do a ac analysis at the same time? If so, I could get vgs from probing vg and vs and get vgs^3. This will have a phase component with it so ideally I could put g3*vgs^3 in vector form but how would I do this?

     Thanks,

    William 
    • Post Points: 5
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Started by SeriousTyro at 21 May 2012 10:56 AM. Topic has 0 replies.