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how to calculate THD ??

Muffassir

 Hi all;

 

 I want to calculate the total harmonic distortion (%)   of my analog circuit.. I have two inputs as Vx and Vy ..Wherein i want to plot the THD variation due to input voltage swing between 0 and 1.8V while Vx set to different DC values.

How can i do that in cadence . I am using Cadence 6.1.4.500 and ADE L . and gpdk180.

 

Thanks in advance..

 

 

Parents

  • You don't need the "erplot" button to do this. Just hit the evaluate button in the calculator (not sure what version you're using) after doing the parametric analysis. Alternative, having set up the single simulation, hit the Setup Outputs icon in ADE and set the expression for THD  as an output. If you run the single simulation, it will display the scalar result in the ADE output pane, but if you then do a parametric sweep, it will plot a waveform of the output versus the parameter being swept. If you then add a second variable to the sweep, it will plot a family of curves - just as you're after.

    Regards,

    Andrew.

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  • You don't need the "erplot" button to do this. Just hit the evaluate button in the calculator (not sure what version you're using) after doing the parametric analysis. Alternative, having set up the single simulation, hit the Setup Outputs icon in ADE and set the expression for THD  as an output. If you run the single simulation, it will display the scalar result in the ADE output pane, but if you then do a parametric sweep, it will plot a waveform of the output versus the parameter being swept. If you then add a second variable to the sweep, it will plot a family of curves - just as you're after.

    Regards,

    Andrew.

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