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Monte Carlo Analysis of I/Q amplitude and phase mismatch

Sai Goutham
Hi all, I am designing a divider circuit for I/Q components. I want to find phase and amplitude mismatch between I and Q components using Cadence with "Monte Carlo Analysis". Please let me know how to set the testbench to find amplitude and phase mismatch ? 
1.) The outputs of dividers are not perfect square waves. So is there any function in calculator to find the amplitude of the square wave and also phase ?

Thanks for the help.

  •  Dear Sai,

    > Please let me know how to set the testbench to find amplitude and phase mismatch ? 

    To examine the relative phase of the I and Q components, I believe you will need to create an expression that subtracts the two phases to compare it to the ideal phase quadrature. This can be done using the cross() function about your switching threshold. By computing the cross() function as a function of waveform cycle for the I and Q components, you can subtract the two to get their relative phase as a function of cycle number.

    For the amplitude, you can use the calculator functions ymax() and ymin() to determine the peak-to-peak amplitudes.

    I hope this gives you some help.

    Shawn

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