[SI-LIST] Re: Crystal Clock Random Jitter

  • From: Tesla <emcesd@xxxxxxx>
  • To: ah.vinod@xxxxxxxxx
  • Date: Thu, 10 Jan 2013 09:36:52 +0800 (CST)

Maybe the resistor's pad and parastic inductance add some discontinuity for 
your clock  transsmission path.
What for do you measure the clock random jitter?
Tesla.






At 2013-01-09 18:39:39,"vinod ah" <ah.vinod@xxxxxxxxx> wrote:
>Hi all,
>I am measuring a Random jitter of parallel resonant crystal clock on a
>tablet board. I plotted histogram and found it to be in bell shape
>i.e. Gaussian distribution.
>
>But when i add a series resistor to reduce the drive current to crystal, i
>find that the histogram shape changes to bi-modal i.e. the one which we get
>when we have both Random jitter and Deterministic jitter.
>
>I am unable to understand the crystal clock jitter behavior after adding
>drive control resistor. I dont see any changes in waveform shape when i
>measure it in oscilloscope, neither the crystal is having any trouble in
>starting up.
>
>Regards
>Vinod A H
>
>
>------------------------------------------------------------------
>To unsubscribe from si-list:
>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
>or to administer your membership from a web page, go to:
>//www.freelists.org/webpage/si-list
>
>For help:
>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
>List forum  is accessible at:
>               http://tech.groups.yahoo.com/group/si-list
>
>List archives are viewable at:     
>               //www.freelists.org/archives/si-list
> 
>Old (prior to June 6, 2001) list archives are viewable at:
>               http://www.qsl.net/wb6tpu
>  
>


------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field


List forum  is accessible at:
               http://tech.groups.yahoo.com/group/si-list

List archives are viewable at:     
                //www.freelists.org/archives/si-list
 
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu
  

Other related posts: