In fact, you’d need a PWM frequency of 20kHz to be worried about the cheaper 40kHz ADCs in some phones. As long as the PWM f is below that, measuring this way makes sense and works. Report comment ...

Performing an FFT assumes that a waveform is continuously sampled from -∞ to +∞. If one of the above mentioned conditions for coherent sampling is not met, non-coherent sampling occurs. Unless window ...

Wideband chirped radar measurements using FFT-based spectrum analyzers Measuring this same chirp with an FFT-based spectrum analyzer is less optimal. The reasons for this have to do with how the ...