[time-nuts] Experience with THS788 from TI?

[SAIDJACK at aol.com]

Jim Williams wrote an appnote on how to do this with ~100ps resolution with 
 a small number of parts.
 
I think it was mentioned before and should be in the time nuts  archives..
 
His circuit can be modified without much effort for higher  resolution.
 
bye,
Said
 
 
In a message dated 3/21/2012 14:03:38 Pacific Daylight Time, lists at rtty.us  
writes:

Hi

Ok, for a legit 12 ps with 0.1 ps drift and 200 mega  samples per second -
not to many alternatives. The FPGA stuff will get you  to 50 to 100 ps on 
the
same basis this gets you to 12 ps. They will get you  to 20 to 40 ps on a
good day - sort of the way this chip gets 8 ps. The  FPGA will do it at a
much lower data rate. 

If you average over many  samples, all of these will get you a better
estimate. How much better  depends on a bunch of things. The TI part *could*
do very well if you have  a 200 MHz signal to look at.

Bob

-----Original  Message-----
From: Ben Gamari [mailto:bgamari at gmail.com] 
Sent:  Wednesday, March 21, 2012 3:30 PM
To: Bob Camp; 'Discussion of precise time  and frequency measurement'
Subject: Re: [time-nuts] Experience with THS788  from TI?

Bob Camp <lists at rtty.us> writes:
>  Hi
>
> Are you after 12 ns or 12 ps? 
>
Bah, yes, my bad:  picoseconds is the relevant timescale here.

Cheers,

-  Ben


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