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Old 30th November 2002, 10:31 PM   #1
OliverD is offline OliverD  Germany
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Question Lost finding perfect oscillator for my DAC

Hello everyone,

I just started designing another DAC, this time with four PCM1704... I've build several DACs with "cheap" components (TDA1543, CS8412), and now I want to try a different approach using only expensive parts declared "high end" by the respective manufacturer and compare the actual sound to my older designs.

I plan on using either CS8420 or AD1896 ASR, therefore I need a low jitter clock...

Doing some research on this forum, I found there are several ideas, some schematics and a lot of references to mysterious projects I couldn't find any details for...

So, can anyone point me in some direction where to find schematics / tips for DIY low jitter clocks?

Thank you and sorry if this question has been asked before, I'm a newbie to this forum :-)
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Old 30th November 2002, 10:41 PM   #2
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Welcome AMT-freak ( what will that be ?)
There's a search function on this forum for this kind of questions
Both Elso Kwak and Guido Tent offer a solution for low jitter clocking.

There's info on Guido Tent's clock here :
http://www.ultranalog.com/schem/XOscillator.pdf

And here:
http://home.tiscali.nl/~t708955/pdf/...uncement_6.pdf

For more info on the clock of Elso you have to mail him. When you use the search function you will certainly find something on the words "oscillator", "kwak" or "jitter".
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Old 30th November 2002, 10:53 PM   #3
OliverD is offline OliverD  Germany
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jean-paul:

Thank you very much for your fast reply, I'll have a look at these.

The nick "AMT-freak" was chosen because I like the ESS Air Motion Transformers (AMT) so much and regard them as the best tweeters I've ever listened to (I did compare quite a lot)
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Old 1st December 2002, 02:15 AM   #4
OliverD is offline OliverD  Germany
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Seems both links don't provide any schematics, just information on where to buy those kits...

I'd rather design a oscillator circuit myself than buy a ready-made kit, however I'm looking for some kind of starting point and ideas, since HF is not my domain.
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Old 1st December 2002, 03:19 AM   #5
jwb is offline jwb  United States
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Check here:

Low-noise oscillator
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Old 1st December 2002, 07:20 AM   #6
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Send a message via Yahoo to Elso Kwak
Post Schematic KWAK-CLOCK

Quote:
Originally posted by AMT-freak
Seems both links don't provide any schematics, ...

Hi AMT-freak,
By sending me a e-amail you will get a complete schematic for DIY use. It is a proven and tested design.
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Old 1st December 2002, 09:07 AM   #7
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Quote:
So, can anyone point me in some direction where to find schematics / tips for DIY low jitter clocks?
AMT-freak,
I am sure I saw a schematic in one of the links. And there is a possibility of obtaining only the oscillator instead of a clockkit.
Maybe I didn't read your question well or you could have put your question in another way.
I know this clock module well. The DIY part is to make a good power supply and/or a PCB for it. The pro for this particular clock is the very small size compared to discrete built clocks. If RF is not your domain the risk of failure will be lower.
Results with this proven and tested design are outstanding
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