THD with Spectre (Cadence Virtuoso)

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saruman1983

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thd in spectre

Hello everyone,

Is there any way I can plot Total Harmonic Distortion of the output vs. the input voltage or current or power in the cadence virtuoso environment?

What I have managed to do so far is to calculate the harmonic distortion for a given input via a transient analysis and by using the thd special function in the calculator. I was wondering if I can somehow sweep the input and obtain the output's thd (all that in one graph).

Thanks in advance
vag
 

virtuoso thd calculator

You can do it by PSS analysis and some DC sweep function available at the bottom of the PSS analysis form. I did it long time back. Since THD is a perfect periodic analysis in most of the circuits, PSS analysis gives a good final solution of the circuit. It provides the DC sweep as required by you. You can read Spectre RF documentation for further details.
 

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