100Mhz crystal

[sugano]

I am collecting the parts for Elso's async-clock and I am having a little trouble finding the 100Mhz crystal. Where can I buy one or can someone sell me one?

Thanks,
P. Sugano

 

[jackinnj]

you can do it with a lower freq xtal

if you overdrive a xtal oscillator you generate a series of harmonics -- just use a bandpass filter at 100MHz for a crystal whose frequency is an integer dividend of 100 MHz. (This is how I used to operate 50Mhz (6 meters) ham transmission with an 8.333 MHz crystal.

or you can buy an XO for the frequency in question.

http://www.mfelectronics.com/products/xo/

 

[joeling39]

I have bought some off this place :

www.klove.nl

Not cheap though.

Regards,
Joe Ling
Malaysia

 

[jean-paul]

I have bought some off this place :

www.klove.nl

Not cheap though.

Regards,
Joe Ling
Malaysia

They're probably made in your country and travelled to Holland and back again 😉

 

[Andypairo]

I am collecting the parts for Elso's async-clock and I am having a little trouble finding the 100Mhz crystal. Where can I buy one or can someone sell me one?

Thanks,
P. Sugano

The 100Mhz frequency is somewhat arbitrary, Kusonoki used a 50 MHz crystal, and Elso himself once said that any frequency > 45 Mhz could be suitable.

In my ASR I use a 80 MHz canned oscillator from a old server motherboard, but maybe I'll try different frequencies as I have several of them available.

Cheers

Andrea

 

[fmak]

Re: you can do it with a lower freq xtal

or you can buy an XO for the frequency in question.

http://www.mfelectronics.com/products/xo/ [/B][/QUOTE]
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Doing a serch for lowjitter XOs, one soon finds that the low jitter ones all hacve ECL or PECL outputs which appears lower than TTL.

What precisely are the differences?


😕

 

[Jocko Homo]

ECL does not saturate, so it is devoid of problems like ground bounce that saturated stuff has. It is always on, and so the output swing will always be a small fraction of the rail voltage.

Jocko

 

[fmak]

ECL does not saturate, so it is devoid of problems like ground bounce that saturated stuff has. It is always on, and so the output swing will always be a small fraction of the rail voltage.

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Thanks Jocko; what then is comlementary PECL? And can these ECL and PECL chips be used directly in place of TTL for clockling transports and adc chips?

Pl explain also WE ARE DEVO

 

[jean-paul]

Pl explain also WE ARE DEVO

You never heard of DEVO ?!?!!? With Google it took me 1 sec.

http://www.freedomofchoice.com/devo/about.asp

 

[rfbrw]

Re ECL

As good a place to start as any.

www.onsemi.com

 

[fmak]

Re: Re ECL

As good a place to start as any.

www.onsemi.com

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Thanks, useful.

The issue is:-

If one uses very low jitter PECL with one of the ONSEMI translator chips, how will that chip affect performance!

 

[Elso Kwak]

DEVO

You never heard of DEVO ?!?!!? With Google it took me 1 sec.

http://www.freedomofchoice.com/devo/about.asp

You jest, you only go to eleven?
http://www.diyaudio.com/forums/showthread.php?postid=281474#post281474

Jock Homo
they tell us that
we lost our tails
evolving up
from little snails
i say it's all
just wind in sails
are we not men?
we are DEVO!
we're pinheads now
we are not whole
we're pinheads all
jocko homo
are we not men?
D-E-V-O
monkey men all
in business suit
teachers and critics
all dance the poot
are we not men?
we are DEVO!
are we not men?
D-E-V-O
god made man
but he used the monkey to do it
apes in the plan
we're all here to prove it
i can walk like an ape
talk like an ape
do what a monkey do
god made man
but a monkey supplied the glue
we must repeat
o.k. let's go!