Bob Cordell, Designing Audio Power AmplifiersQuote:
The stroke of genius here is that applying an input signal to an otherwise oscillating class D amplifier will result in the appropriate PWM duty cycle signal corresponding to the audio waveform.
Originally Posted by RUR /t/1524078/class-d-high-end-amp-thread#post_24524968
Both of the nCores - Theta's implementation and the DIY NC400 - are load invariant. Other OEM implementations e.g. Mola Mola and Merrill (sp?) probably are, too.
Originally Posted by longtimelurker /t/1524078/class-d-high-end-amp-thread#post_24524953
probably makes more sense to discuss class-d power supply strategies. the restbhas been solved.
Originally Posted by Glimmie /t/1524078/class-d-high-end-amp-thread#post_24527442
Now I just built some 20watt class A amps for my LCR tweeters. I cautiously used big switch mode power supplies, 300W x 2 as I had no desire to build a 600 watt linear supply and that fact that true single ended class A has poor PSRR, it would have to be regulated or at least actively filtered.
Originally Posted by stevekale /t/1524078/class-d-high-end-amp-thread#post_24527542
Why? This wouldn't be too hard and especially not for a trained EE. I don't think you will have wanted the main PSU to be regulated. Cap and some sort of PI or resistor filtering, yes, but not regulated in the sense one would normally mean.
Anyway, I guess we should stray off the topic of class D.