Question about cristal oscillator

[Gaetan Mailloux]

Hello

I need a low jitter cristal oscillator that I can adjust between 10mhz and
12mhz, I did founded a circuit in this web page;

http://members.iinet.net.au/~davem2/overclock/osc.html

Does it would be good and have a low jitter ?

In the web site it say that you can adjust the frequency by changing C1
value, so I would use a triming capacitor and replace it by a fix cap wen
I would have the right frequency.

Thank

Bye

Gaetan

 

[Jasen Betts]

Hello

I need a low jitter cristal oscillator that I can adjust between 10mhz and
12mhz, I did founded a circuit in this web page;

do you want to adjust it by exchanging the crystal with a different one?
Crystal oscilators are basically fixed to the frequency
of the crystal. (adjustemnt is maybe +/- 1% if you push them real hard)

Does it would be good and have a low jitter ?

Crystal oscilators are typically low jitter (especially if given a
stable power supply etc), that design was done to get the crystals tp
produce overtones, running in overtone mode may give significant jitter.

In the web site it say that you can adjust the frequency by changing C1
value, so I would use a triming capacitor and replace it by a fix cap wen
I would have the right frequency.

the web site also says you get a chose of F 2F and 3F.
however you
choose F only at-most only one of (F,2F,3F) will be in the 10-12Mhz range.

if you want a low jitter, tunable, oascillator with an adjustment
range that covers 10 to 12Mhz some sort of L-C oscillator may be a
better choice.

 

[Eeyore]

do you want to adjust it by exchanging the crystal with a different one?
Crystal oscilators are basically fixed to the frequency
of the crystal. (adjustemnt is maybe +/- 1% if you push them real hard)


Crystal oscilators are typically low jitter (especially if given a
stable power supply etc), that design was done to get the crystals tp
produce overtones, running in overtone mode may give significant jitter.


the web site also says you get a chose of F 2F and 3F.
however you
choose F only at-most only one of (F,2F,3F) will be in the 10-12Mhz range.

if you want a low jitter, tunable, oascillator with an adjustment
range that covers 10 to 12Mhz some sort of L-C oscillator may be a
better choice.

Possibly followed by a sharp pass-band filter to filter out jitter.

Graham

 

[Gaetan Mailloux]

Hello

I need a frequency of 11.2896 mhz, so I should try to find a crystal at this
frequency but there is nothing like this arround here.

Thank

Bye

Gaetan

Eeyore

 

[Eeyore]

Hello

I need a frequency of 11.2896 mhz, so I should try to find a crystal at this
frequency but there is nothing like this arround here.

Didn't look very hard did you ? Ever heard of Google ? I entered "11.2896 mhz" and
the first hit was this.

http://parts.digikey.com/1/parts/1397902-oscillator-11-2896mhz-3-3vsmd-asml-11-2896mhz-et.html

Seems to include the oscillator too.

Graham

 

[Jasen Betts]

Hello

I need a frequency of 11.2896 mhz, so I should try to find a crystal at this
frequency
Yes!

but there is nothing like this arround here.

You may have to do mail-order.

these guys have a bunch in that frequency,
http://mouser.com/Search/Refine.aspx?N=5115911+4294621326&Keyword=crystal&FS=True

not being a fan of SMT I'd get the top one.

 

[Eeyore]

You may have to do mail-order.

these guys have a bunch in that frequency,
http://mouser.com/Search/Refine.aspx?N=5115911+4294621326&Keyword=crystal&FS=True

not being a fan of SMT I'd get the top one.

The fact is that the frequency he wants is READILY AVAILABLE !

Graham

 

[Gerard Bok]

Gaetan Mailloux wrote:

Didn't look very hard did you ? Ever heard of Google ? I entered "11.2896 mhz" and
the first hit was this.

Sure.
But was that because they stock 11.2896 MHz parts or because they
pay Google to tell you: "When ordered by thousands, we will
supply any frequency in that range" ?

 

[Gaetan Mailloux]

The fact is that the frequency he wants is READILY AVAILABLE !

Graham

Hello everybody

I know Google and Mouser, but last time I've order by mail few
electronics parts by mail (nothing of heavy weight) it cost me $35 for
shipping only, that was too much for my low budget !!

So I am not very interest to do anymore mail ordering.

Thank

Bye

Gaetan

 

[Eeyore]

I know Google and Mouser, but last time I've order by mail few
electronics parts by mail (nothing of heavy weight) it cost me $35 for
shipping only, that was too much for my low budget !!

So I am not very interest to do anymore mail ordering.

Where the heck DO you expect to get them then ?

Graham