the jitter of XO,is mainly come from its circuit?

[X.G.]

In the book 'High-speed digital design' of Dr. Howard Johnson,wrote that(sorry, I must translate from Chinese ,because the book I got is the Chinese version ,I did not get the English version ):

http://www.sigcon.com/

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

the jitter of XO come from 4 sources,
1. the heat noise of the crystal
2.the mechanic noise of the crystal
3. the circuit's noise.this noise is much than the sum of 1 & 2 in general.
4.the noise of power supply.this noise is troublesome,and most of XO are trouble in that.

Cause I want to DIY a XO......my question is,the jitter of 'low noise' XO is mainly come from 1 & 2 or 3 & 4?...in the other words,which contribute much in the low noise XO,the cuicuit?or the crystal?

any input will be appreciated

sorry my poor English.


X.G.

 

[Guido Tent]

In the book 'High-speed digital design' of Dr. Howard Johnson,wrote that(sorry, I must translate from Chinese ,because the book I got is the Chinese version ,I did not get the English version ):

http://www.sigcon.com/

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

the jitter of XO come from 4 sources,
1. the heat noise of the crystal
2.the mechanic noise of the crystal
3. the circuit's noise.this noise is much than the sum of 1 & 2 in general.
4.the noise of power supply.this noise is troublesome,and most of XO are trouble in that.

Cause I want to DIY a XO......my question is,the jitter of 'low noise' XO is mainly come from 1 & 2 or 3 & 4?...in the other words,which contribute much in the low noise XO,the cuicuit?or the crystal?

any input will be appreciated

sorry my poor English.


X.G.

Hi,

Yes, 3 and 4 dominate usually

cheers

 

[X.G.]

Re: Re: the jitter of XO,is mainly come from its circuit?

Hi,

Yes, 3 and 4 dominate usually

cheers

Thanks a lot,Guido Tent.

I still have a little puzzle...Is your reply refer to the low noise XO,or not?

and... maybe the improve method of ML 31.5 transport just get the better performance in only 5% or lesser?😀 😀 😀

An externally hosted image should be here but it was not working when we last tested it.

 

[Guido Tent]

Re: Re: Re: the jitter of XO,is mainly come from its circuit?

Thanks a lot,Guido Tent.

I still have a little puzzle...Is your reply refer to the low noise XO,or not?

and... maybe the improve method of ML 31.5 transport just get the better performance in only 5% or lesser?😀 😀 😀

An externally hosted image should be here but it was not working when we last tested it.

Hi

This is valid for all oscillators

What should I comment on a picture ?

It looks nice......

cheers

 

[X.G.]

Re: Re: Re: Re: the jitter of XO,is mainly come from its circuit?

What should I comment on a picture ?

It looks nice......

cheers

sorry for my poor English.

My meaning is that the ML31.5's method to reduce the mechanic noise maybe just for the improve of 5% or lesser.😱