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45kHz BW distortion study of 3 amplifier topologies (2xAB, 1xD) + A/B test

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pma

pma

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You should also understand that the SAB amplifier has more flat frequency response than the NC252MP especially at high frequencies. The class D NC252MP has limited bandwidth and it has -0.5dB/20kHz. Both amps have their FR at amp output terminals quite independent on load impedance.

SAB_NC_FR.png


10kHz square response shows wide bandwidth and flat FR of the SAB amplifier. It is flat up to 100kHz.
SAB_10kHz_sq.png
 
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