Class D amplifiers have very little phase shift


Too many diagrams to post here, so I just blogged it:

https://inatinear.blogspot.com/2020/02/class-d-amplifiers-do-not-have-horrible.html

The 20 degrees at 2 kHz argument is bunk.
erik_squires
@imhififan

I wrote this:

The actual values are irrelevant for the purposes of this discussion.

I meant to say that I just picked whatever XSim uses for the defaults.

Best,

E
I'm not worry about the small inductor, but the capacitor parallel to the speaker.
It is important to note that output impedance chart varies from 5 milliohms to 50 milliohms, so the effect at worst case of the magnitude and angle of the impedance on the speaker are tiny, so the lower chart with the actual output should give a very good idea of how the amp would perform.
Shown values don't make any sense.  10uF would represent about 0.8 ohm capacitive reactance at 20kHz, while series resonance of  1mH and 10uF would be at 1.5kHz