Issue with that is that not everyone uses the same software. I use altium, and easyeda for ease of ordering with more accurate jlcpcb pick and place. Layer schetching, entire schematic etc would be great, bom... Discussion about that too, good, bad, changes etc.
First, I do not propose it, I have it and will use it.
Again, there are two parallel threads, one about "what exactly I personally intend to do" which is based on what I can easily in Thailand and another about a "community project based on the same adjustments of understanding.
I would have used a hardware based board, if one was for sale on Lazada.
I have no objections to your design, though I am unsure why it would be used in a new design, instead of designing in the CPLD.
Incidentally, did I miss the binary or source code for the CPLD? Or are you getting it preprogrammed by the vendor off the page as special part number?
Thor
Thor
Hi !Thor everything is described here in detail and available to everyone. Incredibly I also succeeded, I was completely ignorant of handling these objects.😊
https://electrodac.blogspot.com/p/i2s-to-pcm-dac-converter-tutorial-cpld.html
Below VHDL 16bit code
https://drive.google.com/file/d/15GDDx-r7_I4FSliPg6QHG-wYLn_KhX3q/view?usp=drivesdk
https://electrodac.blogspot.com/p/i2s-to-pcm-dac-converter-tutorial-cpld.html
Below VHDL 16bit code
https://drive.google.com/file/d/15GDDx-r7_I4FSliPg6QHG-wYLn_KhX3q/view?usp=drivesdk
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Because it is pin compatible with SAA7220 and could also be useful for CD player updates and for users who want to experiment with OS vs NOS and I2S vs SIM + NOS. If you spend a few minutes of your attention on the files I previously attached, you will notice that there are several options for its use.
Antonio
So is it only NOS, or has OS options ?
Is there also a pin compatible version for PMD100 ?
Patrick
Is there also a pin compatible version for PMD100 ?
Patrick
1) OS with SAA7220
2) NOS removing SAA7220 and putting adaptor.
3) At the moment there isn't PMD100 pin compatible but i think It is possibile do it.😉
I put the vaue of Rdc from other L spice model just to test the model configutation circuit. (It was from 0.4 nH 1.85mohm).
Off course that should be a much lower due to keep the output impedance of the shunt very low. But these 1.5R from Panasonic is also a bit higher for the shunt end?
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Yes, but I tred this and it is no significant improvements. But since it is not a large addition of elements could be included?
Darlington pass transistor is making a difference even a 3 x "darlington" working very very good. I made one simple pre-regulator of 3 "darlington" pass BJTs, base-MPSA18, middle-BD135 and power-BD241, and it was deadly quiet. Also tried TIP31 as TO-220 package for power pass BJT and was the same. TL431 was reference voltage. Like in the example.
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Thanks for useful tips 🙁
It would be useful (perhaps, I think the vertical PCB is too tall) for modding my Marantz PM-75 built-in DAC.
Maybe.
I did pay attention. I made no mention as they have no use in my personal project nor am I exceedingly convinced of the usefulness for the larger project.
The CPLD route could be interesting if we (say) decided to make a "TDA1541 Plus" design.
I will write more on that in a separate post IF THERE IS INTEREST. The problem with "TDA1541 Plus" is that needs completely new CPLD code.
Thor
I used the previous model plate from cdream-5.
For OS opperation, SAA chip needs +12V additonal power suply to be used. Connector offcourse is present on the PCB.
I use a very different setup with low impedance Ultra/Super Capacitors forming a PASSIVE power supply.
No significant improvement in what sense? Thermal stability? Ability to get 5V out with a 5V reference?
Personally I now use the SXST as standard regulator circuit (shunt or series), with RC filtered TL431 as reference:
As there is internal feedback in the TL431 and the SXST I cannot really claim "non-feedback" but in practice for series regulators the result is the same, but with a near zero thermal drift.
Thor
No, ELC-11D series.
https://www.mouser.com/ProductDetai...GAEpiMZZMv126LJFLh8y%2bK1YZe8t4pjcibr9b4Sy4M=
Most things genuine I can get in Thailand easily are obsolete overstock.
Thor
Edit any to-92 Zeltex over BD13x ? (Beta related - and good noise also) ?
I am in vacation and casualy read here because I was TDA1541A ElonMusked implanted before we know his name btw, which means we are getting old.
Basic question :: Is there a possibility to proceed w/o the Farads cells/supercaps ?
Phantom Power with LIfe4Po t(welcome fire un home) , or trad R-Core with good enough phase seen tot he load ?
I am reluctant with the super Caps. Orr not. Well not sure ?! Floating ?
Is there a correlation with phase of the reg outputs and analog stage compliance ?
I mean (but end of my second bottle) if it snaps !
I want it Hell sided. Darlington works well for that in P for the feeling of... PRATT, dynamic, whatever the word people gives to the : it buggies man !
Ziklai (Darlington-not other name).
That's for the blah.
What I do not understand at that moment is how "regs" contribute to a better sound and a snappier sound related to the TDA11541A voltages inputs (related to the reg toplogy).
I have no clue, while toying from a long time with that chip, w/o though, true scientifical method. (But we know all as scoentists how can be corraleted tests in relation to the theory !)
Okay, I knoww on how to make the TDA1541A PSs' to rock (- about the sound (which doesn't mean it is the best sound or the good balanced one).
Follower emitter serie regs works good to me with the TDA1541A. I read everywhere shunt regs were best though ?
I am a non tech (I mean there for my hobby). I have a long experience (ahaha it means nothing but linguistical, let say I was as many, Tiger Mosquito contamined with the TDA1541A NIL's fevcer!) ) with caps both on the magical and the on the floor specs (we need both in my experience).
When I see those complex charged regs, I am suspisciious ! But I eally having no clue about tech, well here.
So, we all agrred the PS and regs topology matter... most !
Okay we do need flat, very low impedance, to ..... what? the -6dB nof the op amps or designed passive circuitry ?
I know more or less the ESR, impedanxce outputs, related to the capacitance/voltrage combo; tried also most of the known brands (and it matters in my own modded DAC).
What I would to know (PSRR, EMC, okay) what is working at the ned seen from the DAC ic ? Phase ????
Let me please reduce it at the most basic level,. I hear a lot of power supply and regs, most often but non only, TDA15451A non A, S1, Taiwann, Babel -Tower, ABBA pedigree, but non a S2 yet (ashamed as a basic fan).
Is it the ended capacitor that has the last word, as far we given it the input good parameters ?
Zetex over BD13x ? (Beta/noise floor good couple ? To 92???)
Each time I heard a better "reg" with better subjective sounding, it was always a ****** in the face !44.
In the shematic, the 330 uF cap , critical, no ?
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Choosing his wife or a DAC asks.... a well assumed risks part !
Just a little off topic ! I aam flying, please continue the good work, please !
Would bere pleased o hear a morning Raga, between Darjelling and K2 ! 🙂
But, but : here is one of my 40 tracks brnchmarks I listen to from ... some times ago !
But finally prefers this :
Just a little off topic ! I aam flying, please continue the good work, please !
Would bere pleased o hear a morning Raga, between Darjelling and K2 ! 🙂
But, but : here is one of my 40 tracks brnchmarks I listen to from ... some times ago !
But finally prefers this :
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