Is this cristal clock schematic would have a low jitter ?

gaetan8888 · 20th May 2010, 01:26 AM

Hello

Is this cristal clock schematic would have a low jitter ?

Do it need improvements ?

Thank you

Bye

Gaetan

Bernhard · 20th May 2010, 03:41 AM

The colpitts would be better with a FET, and use a comparator instead of the inverter. There are ready schematics around.

EUVL · 20th May 2010, 04:58 AM

Check this out :

http://www.bgaudioclub.org/uploads/d...er_Matthys.pdf

Patrick

QSerraTico_Tico · 20th May 2010, 05:01 AM

Quote:

Originally Posted by Bernhard

The colpitts would be better with a FET, and use a comparator instead of the inverter. There are ready schematics around.

yes:
Can someone send to me the Elso's latest clock schematics (version6)? :)

gaetan8888 · 20th May 2010, 06:24 AM

Hello

Looking at the pdf doc, the Pierce circuit seem to be the best for a simple circuits, but this doc don't talk about jitter in crystal oscillators circuits.

Thank

Bye

Gaetan

gaetan8888 · 20th May 2010, 06:44 AM

Hello

Digging a bit more in the forum I also found the LC clock, image included.

Agree that comparator can be better but I have none of them and have a lot of inverter chips.

I know the Kwak clock but it use a comparator.

Thank

Bye

Gaetan

gaetan8888 · 08:28 AM

Hello

I've done a Google search, it's a bit puzzeling, some texts say that the Pierce crystal oscillators are much noisyer than the colpitts crystal oscillators, others texts say that the Pierce crystal oscillators are the better .... ??

Between the Pierce and the colpitts crystal oscillators, which one do have the lowest jitter ?

Btw, I include an image of a Pierce crystal oscillators.

Thank

Bye

Gaetan

merlin el mago · 20th May 2010, 12:36 PM

Quote:

Originally Posted by EUVL

Check this out :

http://www.bgaudioclub.org/uploads/d...er_Matthys.pdf

Patrick

Bufff, superb information Patrick, thanks to share.

Felipe

EUVL · 20th May 2010, 03:13 PM

In the link I attached in Post 3, the various circuits are rated for their stability and power supply rejection. There is little mention of phase noise.

Here is a couple more to consider :

http://www.wenzel.com/pdffiles1/pdfs/xtalosc.pdf
Library
Library

I always try to understand the subject first before copying anything from the net.
As for oscillators, I am still in the middle of that process, since early this year.
Just wish to have more (free) time.

Patrick

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20th May 2010, 03:41 AM	#2
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	The colpitts would be better with a FET, and use a comparator instead of the inverter. There are ready schematics around.

20th May 2010, 04:58 AM	#3
EUVL diyAudio Member Join Date: Oct 2003	Check this out : http://www.bgaudioclub.org/uploads/d...er_Matthys.pdf Patrick

20th May 2010, 06:24 AM	#5
gaetan8888 diyAudio Member Join Date: Apr 2007	Hello Looking at the pdf doc, the Pierce circuit seem to be the best for a simple circuits, but this doc don't talk about jitter in crystal oscillators circuits. Thank Bye Gaetan

20th May 2010, 03:13 PM	#9
EUVL diyAudio Member Join Date: Oct 2003	In the link I attached in Post 3, the various circuits are rated for their stability and power supply rejection. There is little mention of phase noise. Here is a couple more to consider : http://www.wenzel.com/pdffiles1/pdfs/xtalosc.pdf Library Library I always try to understand the subject first before copying anything from the net. As for oscillators, I am still in the middle of that process, since early this year. Just wish to have more (free) time. Patrick