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Advanced function with Virtuoso Cadence

zizo2012

Hello,
I work on the characterization of an amplifier circuit in Cadence Virtuoso and I do not know how to perform some function in the calculator.Please can you help me and send me an advanced tutorial on the use of this software or help me by answering the following questions and I will be very grateful?
Q1: How to determine the parasitic impedance (R, C, L) of a circuit in Virtuoso and trace the signal of the real part and the imaginary part (in dB) versus frequency?
Q2: How to determine the value of the harmonic distortion of the output signal, and how to plot it versus the frequency?
Q3: How to identify and trace the change in equivalent noise brought back into function of frequency?
Q4: How to determine the power dissipated by the circuit?
Thank you.

Parents

  • This is a bit more than "how to perform some function in the calculator". Mostly this is about knowing what analysis to run in the simulator.

    Some (short) answers given that these are potentially big subjects in themselves. Hopefully this will point you in the right direction though.

    1. Several ways you could do this. One is to use an sp (s-parameter) analysis, and another is to use ac analysis. There are functions to plot the s-parameter results, and there's also the real and imag functions in the calculator. Depends on what you're really trying to do here...
    2. You could use tran analysis, and then the thd function in the calculator. Or you could use the pss or hb analysis and directly get the resulting spectrum. Not sure that harmonic distortion versus frequency is quite what you want - it wasn't clear though.
    3. Perform a noise analysis? Depends what you mean by "equivalent noise".
    4. Measure the current through your supplies and then multiply it by the voltage across the circuit. Probably use rms function to give you the RMS power?

    Andrew.

Reply

  • This is a bit more than "how to perform some function in the calculator". Mostly this is about knowing what analysis to run in the simulator.

    Some (short) answers given that these are potentially big subjects in themselves. Hopefully this will point you in the right direction though.

    1. Several ways you could do this. One is to use an sp (s-parameter) analysis, and another is to use ac analysis. There are functions to plot the s-parameter results, and there's also the real and imag functions in the calculator. Depends on what you're really trying to do here...
    2. You could use tran analysis, and then the thd function in the calculator. Or you could use the pss or hb analysis and directly get the resulting spectrum. Not sure that harmonic distortion versus frequency is quite what you want - it wasn't clear though.
    3. Perform a noise analysis? Depends what you mean by "equivalent noise".
    4. Measure the current through your supplies and then multiply it by the voltage across the circuit. Probably use rms function to give you the RMS power?

    Andrew.

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