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takashi 29th November 2003 05:19 AM

let 's share my DAC
let 's share my DAC

Tieftoener 4th December 2003 03:13 PM

Thanks for sharing your work, but could you give us a little explanation and more detail for those of us that don't read Chinese?

Nice looking boards!

peranders 4th December 2003 03:57 PM

Very nice CAD job! :up: Cool with round corners of the traces.

Can't you try to write in english at your homepage?

Are the holes gold plated? Very nice!

Schematics, please!

li_gangyi 4th December 2003 04:05 PM

I can probably do a quickie translation...just gimmi a few moments here...

li_gangyi 4th December 2003 04:22 PM

Ok here it is...
------------------------Strat Of Translation-------------------------------------
This time round we're gonna play around with the Analog Device's AD1955
Pictures of the DAC
I did the PCB twice. The first was without the Sampling Module. The second time round, the PCB is more complete and has got a "high-end" feel to it.

I also can now play around with the parts and use better grade stuff for the project.

I used SMD parts this time as they have lower noise and lead inductance compared to through hole parts. This helped to reduce overall noise and increase performance.
Another Picture
From the AW-D1 onwards, all the DACs will be using an external power source, which will make he circuit more flexible. The DAC and DIR1730 will have an "Upgrade module", which makes it easier to add in an Unsampling module and Re Clock Module.

This time round with the AW-D2 I used a DIR1703 and made a few improvements, and compared to the DAC 1.0 it's a very big improvement. I also used a TCXO clock in this design, it is now my current favourite, therefore I had to use it~!!!

Because the D2 uses a AD1955, it is very different from the BB(T1), the sound is very strong, and worth a try.
Insert Picture here
In the anlog filter stage, there a few "special" components, namely the 681Ohms resistor. Let's not be afraid, we're not in deep water...yet...those are Dale resistors, and are an intergral part of my design, although it may seem must be there.-------------------------
Insert another Picture
If the D2's production is on time.The PCB will probably be released in the Christmas or 2004's New Year region. Do await further announcements.
---------------------------End Of Translation-----------------------------------

I know my Chineses sucks...I am kinda borderline in my Mother Tongue..I'm actually better in please excuse any obvious Errors...maybe some of u might want to correct me~!!!

peranders 4th December 2003 09:19 PM

You don't have to worry a thing about your english. It's good :up:

takashi 7th December 2003 07:02 AM

hi li_gangyi
thanks a lot! :cannotbe:

and the schmetic file will be release later, please d/l it later.;)
in fact i want to post here, but the file size is too large.. :bawling:

mwmkravchenko 7th December 2003 01:57 PM

Beautifull Work!!!
A fine job. Are you going to share the design in the form of pcb patterns or schematics???


hifi 7th December 2003 02:42 PM

the scheamatics are on his site aswell as really cheap pcb:s

/ micke

takashi 8th December 2003 03:26 PM

of course i will post the design in the form of pcb patterns or schematics in my website.
but need to do it later, since i am very bust within this 2 week...

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