The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "PCS Electronics"
Subject: Re: Low jitter xtal oscilliator
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Thu, 21 Nov 2002 13:16:56 +0100
NNTP-Posting-Date: Thu, 21 Nov 2002 13:17:05 MET
Organization: Slovenija OnLine - SiOL
Check the arrl handbook, if my memory serves me right
there was a design for a low-jitter oscilator.
Marko - PCS Electronics
Turn your PC into a FM radio station!
tel +386 31 318 236
NOTE: It is important that you include the entire contents of this
message in your responses. This will greatly speed up future
"Martin Griffith" wrote in message
> On 20 Nov 2002 16:10:48 -0800, email@example.com (Tom Bruhns) scribbled:
> >To start with, you could do better than the 74HCU04 output buffer.
> >I think the bypassing is a bit silly. What's required here is
> >rejection of noise on the power supply lines (coming in) and you don't
> >need all that bypassing to do that. There are more efficient ways.
> I was going to use a separate LM317 for the crystal supply, I thought
> that stepped C array was a bit of "audiophile bullshit"
> >What is the claimed phase noise performance? Is it as good as you can
> >do with a good commercial "can"?
> The article did not provide any specifications, that why I posted the
> question, does it look a reasonable circuit in the first place, being
> not very knowledgeable about crystal oscillators
> I've just been looking at the CMAC site, they didnt supply any jitter
> info on the data sheets :(
> >Beware of what noise on the power supply will do to the phase noise.
> >Have you determined what phase noise (or jitter) is required for your
> >application? Will this circuit meet that need? Will a simpler
> >circuit meet that need?
> An old AES paper shows this graph, this was when 16bit ADC/DACs were
> the norm
> so better than this, some guys are saying that 9pS jitter is too much
> these days, with 24bit converters being standard issue
> >What other needs do you have? Will you need to distribute the same
> >clock to multiple users, or is it used only one place?
> yes, to maximum of 4 devices, and a divide by 256 for a wordclock
> >Martin Griffith wrote in message
> >> Any suggestions/comments on this circuit as digital audio master
> >> oscillator?
> >> http://martingriffith.users.btopenworld.com/OSCSPDIF.GIF
> >> Martin
> >> Warning: Tolkien is hobbit forming
> Minimum safe distances between street musicians and the public:
> Violinist: 25 feet
> Bad Violinist: 50 feet
> Tone Deaf Guitar Player who knows 3 chords: 75 feet
> 15 year-old Electric Guitar Player with Nirvana fixation: 100 feet
> Accordionist: 60 miles
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup