new GAN amplifier

@georgehifi  not much going on over there recently is there?

atdavid516 posts11-25-2019 11:00amNote that MOSFETs don't have secondary break-down effects, hence EPDR is not nearly as critical for FET output stages. They don't mind high instantaneous power.

When did you last look at a MOSFET SoA plot? Its true that going back 30 years or more they generally didn't have secondary breakdown issues but these days its rare to find an SoA plot which is purely thermally limited.

Thorsten Loesch particularly shows his lack of knowledge.

Agreed - its obvious he conflates 'clock rate' with 'symbol rate'. Its not the clock rate of the classD amp which is around 500kHz, rather the symbol rate. There's no clock rate in fact - because classD is an analog amplifier, not a digital one. Since there's no quantization of the symbol widths his comparison to DSD or S-D DACs is totally meaningless.

Are they really great mates? If so then Thorsten would do well to bury himself in Bruno's technical papers in relation to classD and ask his buddy pertinent questions when he gets stuck.