Zanden Parallel DAC Questions

[fedde]

Zanden Patent

Where did you find the patent ? Could you mention an URL ?

Fedde

 

[Elso Kwak]

Zanden Patent

Hi Fedde & dhaen,
Dhaen are you able to read and translate the Zanden Patent?
It can be found here:

http://l2.espacenet.com/dips/viewer?PN=JP2000349579&CY=gb&LG=en&DB=EPD

If you click on the patent number you get to the original Patent PDF-file.
All text is in Japanese characters! Thanks in advance!
Thanks go to Thorsten for the espacenetlink and patentnumber!

 

[dhaen]

Elso,
Page 1/13 in Japanese:
http://l2.espacenet.com/espacenet/bnsviewer?CY=gb&LG=en&DB=EPD&PN=JP2000349579&ID=JP2000349579A++J+
is the summary and is essentially the same as appears in English on page:
http://l2.espacenet.com/dips/viewer?PN=JP2000349579&CY=gb&LG=en&DB=EPD
The drawing shows the filter block diagram.
Filters 12,13,14,15 are band pass filters.
Filter 31 is a low pass filter.
The text on pages 2~6 has been scanned-in so is in graphical form rather than text. This means "looking up" the old fashioned way, so will take some time - it's heavy going stuff.
I might start on the graphs and diagrams. By presenting those first, it gives me more idea what it's about, and you a preview.

You might also ask Tiroth for some help if I'm too slow

 

[Pedja]

Re: Zanden DAC

From what I make of it the 1kHz squarewave must look horrible too. But I may be completely wrong. How on earth can this sound good???

This is the way it looks. That 5x R-L-C series in parallel only filter has somewhat larger overshoot, but rings a bit less and notches are a bit deeper.

Pedja

 

[Elso Kwak]

Square wave

Hi Pedja,
Compare this to the squarewave from a NON-OS DAC without filter or Bessel filter.
http://home.triad.rr.com/scottnixon/dac.htm

 

[Pedja]

Elso,

Of course. I also have a problem to accept this. Look closer and you’ll see it rings at all those frequencies (44.1kHz, 88.2kHz etc… yes, lowest frequency is 44.1kHz). But I have the great respect for the people who made such thing. Also, some people consider it the best CD player ever…

Pedja

 

[Pedja]

Elso,
...Look closer and you’ll see...

I just saw your post in the other thread… OK, look tomorrow.

Pedja

 

[Elso Kwak]

Zanden DAC

Hi Pedja,
Did you actually build this DAC and filter or is this some kind of simulation (PSPICE)??. It looks just like a scope picture. If you built this DAC my question is of course how does it sound?

 

[Guido Tent]

Just look at the ever returning example of the Zanden 5000 Mk2 at www.zandenaudio.com. [/B]

Hi

While I do not know the sound of this DAC, it looks impressive. Does anyone know which SPDIF input receiver they use ?

 

[jean-paul]

Hi Guido, what can it be besides a Crystal chip ? There is not much choice left, is there ? Maybe "Kuei Yang Wang" knows ?!?!?

 

[Guido Tent]

Hi Guido, what can it be besides a Crystal chip ? There is not much choice left, is there ? Maybe "Kuei Yang Wang" knows ?!?!?

Hi JP

If it is the Crystal, do they attempt to improve the jitter of the recovered clock ? It might make an even better DAC if they do so.....

I am still surprised that 99% of the industry is blindly following semiconductor manufacturer standard applications......

all the best

 

[jean-paul]

Hi Guido,

Well for 9800 US $ it they should have made an attempt to improve the jitter of the recovered clock don't you think ?

Regards,

Jean-Paul

 

[rfbrw]

Hi Guido, what can it be besides a Crystal chip ? There is not much choice left, is there ? Maybe "Kuei Yang Wang" knows ?!?!?

The suitably retro SAA7274 ???

 

[jean-paul]

Ha ha, I miss the in your answer.

 

[Pedja]

Re: Zanden DAC

Hello Elso,

Unfortunately it is only SPICE.

Pedja

 

[Elso Kwak]

Re: Re: Zanden DAC

Hello Elso,

Unfortunately it is only SPICE.

Pedja

Hi Pedja,
No problem, SPICE is just fine for these kind of things.
All the best,

 

[TV Man]

Zanden Filter

Hi all,

Does anyone have plans to try a DIY version of the Zanden filter??

Thanks

 

[ash_dac]

Re: Zanden Patent

Hi Fedde & dhaen,
Dhaen are you able to read and translate the Zanden Patent?
It can be found here:

http://l2.espacenet.com/dips/viewer?PN=JP2000349579&CY=gb&LG=en&DB=EPD

If you click on the patent number you get to the original Patent PDF-file.
All text is in Japanese characters! Thanks in advance!
Thanks go to Thorsten for the espacenetlink and patentnumber!

Hi,

There is now a US patent (English language). Check out the pdf file at the link here:-

http://www.freepatentsonline.com/6721427.html

Kind regards,

Ashley.