[time-nuts] Linear Interpolator

[Ulrich Bangert]

Hi Stephan,

a lot of excellent scientifical reading is availabale on the net about
that topic. My personal #1 reference is "A Jitter Characterization Sytem
Using a Component-Invariant Vernier Delay Line" by Antonio H. Chan. 

There are other companies to sell ready to go ps resolution stuff but
not at the prices of ACAM.

Regards 
Ulrich

> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Stephan Sandenbergh
> Gesendet: Freitag, 30. Juni 2006 14:02
> An: 'Discussion of precise time and frequency measurement'
> Betreff: Re: [time-nuts] Linear Interpolator
> 
> 
> Hi Ulrich,
> 
> Thanks for the tip. And, also many thanks to Magnus for 
> introducing me to the concept of Time-to-Digital conversion. 
> It is a brilliant and yet so simple technique. (Until 
> yesterday, I blissfully believed that a fast clocking counter 
> was one's best bet.) 
> 
> Accordingly, I did a bit of research on the topic:
> 
> Google took me to a lot of interesting sites (as Tom van Baak 
> noted). However, I found only one company, Acam (which is the 
> one you also pointed out), that sell these things inside an IC.
> 
> I also read the article posted earlier by Tom van Baak 
> (Thanks Tom! This is indeed a very comprehensive article.) It 
> turns out that you can implement a very elegant linear 
> interpolator using a digital delay line inside a FPGA. It is 
> called the Vernier technique. From the article I understand 
> that resolutions of between 10s and 100s of picoseconds have 
> been achieved for various designs.
> 
> Has anyone else used this Vernier technique with delay lines? 
> I seems pretty neat to me.
> 
> It means my hardware doesn't need to change. A software 
> update will do the
> trick :)   
> 
> Regards,
> 
> Stephan.
> 
> PS: Thanks Ulrich for the link to your M12+T results. I was 
> looking all over the place for these results for a long time now. 
> 
> 
> 
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