No and you can find the answer + discussion about this about 4-5 pages back.
No, it has an analog output stage... so it has an DAC - or it would only play noise.... but anyways...
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Always wonder about my Zoudio, if it can be used as a DAC but with no comparitive power output versus a speaker. How low could I get the disto to go, with miniscule loads.
I realize the output filter is designed for ~8 Ohm, what if I could change that to anything I want to match a higher Z load? Balanced DAC output with respectable disto levels?
The Texas Instruments IC's (TAS something something) he's using even have analog output on the IC, that you have to connect to the Class-D input stage with some capacitors in between.
Actually, it's the TAS5825 which sports in-chip PCM to PWM -
Other chips by TI, such as the one in my HiFiBerry rPi shield amplifier, do have what you describe. Been wanting to intercept that cap, but alas, whomever did the layout used this grain-of-salt sized component; etch ruined the moment the soldering iron touches it. Unsure what changing cap composition would do soundwise; perhaps the miniscule MLC cap used isnt presenting anything I'd ever hear anyway. But it was noted in an inspection of that amplifier design.
Also noted in that particular chip is the ability to implement bi-quad filters, which rPi doesnt have the ability to make use of, software wise. I2C re-programming and all at startup. It would be cool to be able to stack those amplifiers woofer midrange tweeter, with each amplifier having DSP filter settings appropriate to the driver it's connected to.
Here's another new one doing it with GaN output devices, but with analog front end and driver stage, unlike this Peachtree digital all the way to the output stage.
https://www.javahifi.com/review-product/gan-fet-power-amp-single
Review of it
https://twitteringmachines.com/review-java-hi-fi-single-shot-integrated-amplifier/
Cheers George
https://www.javahifi.com/review-product/gan-fet-power-amp-single
Review of it
https://twitteringmachines.com/review-java-hi-fi-single-shot-integrated-amplifier/
Cheers George
Must be blind😎, I'll repete it again and emphisize the part you can't see.
"unlike this Peachtree digital all the way to the output stage."
No, unfortunately it isn't that simple ! And no there are definitley no digital amplifiers - and there will never be. Digital amplifier is just a marketing BS term.
The "most digital ones" (actually also a BS term) are those with a digital modulator driving the switching stage. But these are actually power DACs and therefore MIXED SIGNAL circuits.
Regards
Charles
The "most digital ones" (actually also a BS term) are those with a digital modulator driving the switching stage. But these are actually power DACs and therefore MIXED SIGNAL circuits.
Regards
Charles
You are wrong again - its not "all the way to the output stage"... it has a PWM modulator before the H bridge and it is analog.
What is generating the PWM is by all means a DAC - even if you do digital to PWN in "one step"..... So what you try to describe is a 4 stage function:
1: Digital from end - digital.
2: DAC - going from numerical representation to analog form i.e. first part of DAC is digital, the last part is analog.
3: PWM modulator - analog.
4: Switching output stage - analog.
See?
Please correct your thread title - you can edit it you know - even now...
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Ironic to call things "simple", while not having the explanation of amplifier classes right. Which takes less than ten seconds to double check such basic things.
Its only now that it clearly comes to me, that its called Class D, because D comes after C.
I love Diyaudio.
Cheers!
I love Diyaudio.
Cheers!
One would think - with free will and all - that one would be free to comprehend it in any suitable way.
Personally I like to think of the pulse width as having discernible, quantized steps; discernible meaning it could be converted back to the source digital word as a trivial effort, such that the two representations are identical information wise except in different forms. Then, as convenient via the PW form, it becomes (how I look at it anyway) analog via the electrical action of the output filter; current going back and forth through the inductor, in developing one of those "continuous" forms of electricity across the capacitor. In my mind (which is a wild and crazy place) that's where the conversion from D to A actually takes place in these PCM to PWM translation designs.
Of course everyone's free to comprehend it in their own way; I'm not going to fight someone to say "Oh, my way is right!" or whatever - It's only how I like to do it.
Personally I like to think of the pulse width as having discernible, quantized steps; discernible meaning it could be converted back to the source digital word as a trivial effort, such that the two representations are identical information wise except in different forms. Then, as convenient via the PW form, it becomes (how I look at it anyway) analog via the electrical action of the output filter; current going back and forth through the inductor, in developing one of those "continuous" forms of electricity across the capacitor. In my mind (which is a wild and crazy place) that's where the conversion from D to A actually takes place in these PCM to PWM translation designs.
Of course everyone's free to comprehend it in their own way; I'm not going to fight someone to say "Oh, my way is right!" or whatever - It's only how I like to do it.
It does not. It's continous. It glides continuously on the slope of a triangle wave. No numbers (0,1,2... 65535) involved. So not digital (digit=number....).
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