Sep 7, 2015 · There are many ways to measure THD in practice, but [Michael Jackson] has an interesting video showing how he easily visualizes THD using LTSpice.

Say thanks and support me with boba tea at: https://ko-fi.com/trevortjesIn this video I show you how to measure total harmonic distortion or THD manually and...

Dec 14, 2011 · I created an LTSPICE add-on to automate THD measurements and plot result in the form of THD vs. Amplitude and THD vs. Frequency graphs. It outputs sinusoidal signal with amplitude or frequency stepping sweep into device under test (DUT). Output signal from DUT is feed into analyzer input.

Nov 24, 2010 · Better to use the traditional loop gain/phase calculations (gain/phase margins) within LTSpice. Check the Spice thread and the spice examples for Middlebrook probe. 0.01% THD at 100-140W output when using command: .four 1kHz V (output) in spice directive.

May 6, 2018 · THD is something that is measured in a hifi audio amplifier. You put in a perfect sine wave, at say, 1000Hz. You analyze the output waveform to see if the non-linearity in the amplifier has contaminated the output signal with harmonics of 1000Hz.

Nov 4, 2023 · #THD #TotalHarmonicDistortion #ltspice #simulationIn this video, I am gonna show you about THD simulation in LTSpice.-How you can check real FFT of waveform ...

Jul 14, 2020 · You can't measure a damn thing with LTSpice as it is a simulator rather than measuring equipment. If you want to simulate more accurately, turning off data compression, giving the circuit more time to settle, restricting the maximum timestep and reducing reltol are things you could try.

Oct 24, 2018 · Can someone please add whatever is necessary to this LTspice file to measure THD at Vtr. No great precision needed. I've read several descriptions but stupid here doesn't understand.

Oct 4, 2023 · Distortion calculation with LTspice. As an alternative to manual calculations, it is possible to use LTspice for harmonic distortion calculation to model the circuit and observe its effect on the input signal. Once the circuit has been modeled, its response to a sinusoidal signal can be simulated with the following directive, whose syntax is:

Dec 17, 2019 · Is it possible to perform .four THD analysis of an arbitrary expression in LTspice? It works seamlessly with simple expressions like V(out) or I(Rload), but I would like to perform THD analysis on...