pabo's 0.0008% dist class D module

[Kenshin]

Hysteresis + partial post-filter NFB topology... SODA or Simpw?

No matter how it compares to others - it definitely makes a cool impression.
From the load-dependancy it looks as if it is at least partially a post-filter NFB topology.

Regards

Charles

 

[Pabo]

Some questions to be answered:

- Heat dissipation in the PCB? Well, all of the losses are not situated in the FETs so at 150W into 8 ohm we have to get rid of about 5W in the FETs. Without the mounting bracket this will not be possible continuously but only for about 30s before it shuts down. With music, it will not be a problem as the average power is only 1/8 of 150W so you can easily run the module at "full" power with music both into 8 ohms and 4 ohms.

- Patented hysteresis modulator? No, it is not the modulator that is patented. I have changed the text in order to avoid confusion.

- THD at high frequencies? We can certainly lower THD+N to below 0,02% at 6,67kHz but at the expense of lower efficiency and much higher idle losses. In my opinion a class d amplifier should have really low losses, otherwise you loose one of the key features. Extensive listening tests has shown that lowering THD+N below 0,05% at 6,67kHz does not improve the sound quality further.

 

[peranders]

I read here that Anaview is joining their forces with Hypex. Good luck.

 

[classd4sure]

So what's ground breaking about the pumping equalization circuit... still using multiple rails?

Good luck with the THX 2 ultra spec. Keep us posted on that.

Any chance of changing the font on the news site to something that doesn't make one blind?

Cheers