Hello
I have Tina-Ti, with all types of analogs circuits simulations, wen I use the Fourier Series analysis it give wrong values since it give mostly between 7% and 50% of distortions reading, I did compared those distortions numbers of my circuits by making prototypes using my HP distortion analyser and the number are a allways under .01% of distortion with my HP.
I include an image of test circuit on Tina-Ti.
Do I made any errors in my use of the Fourier Series ?
A helps are welcome.
Thank you
Bye
Gaetan
Hi Gaetan,
Can you plot the transient waveform on VF2? If it resembles a sine wave then the problem is in the settings for the Fourier Series.
Thanks,JC
Gaetan,
By the way, try not to start the sampling at time=0, as the output usually need a few cycles to enter pseudo-steady state. Instead, only sample the last period. You may also want to tight up the tolerance in analysis parameters. Note that 16384 samples in one period will only give you up to the 14th harmonic.
Regards,
JC
I did start the sampling of the Fourier series at time=1 and it was still giving the same erronous high distortion reading.
I did the steady state analysis in transient method, you can see the sine result in the image I Include here.
Thank
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