From: Paul Boven <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Linear Interpolator
Date: Fri, 21 Jul 2006 00:54:35 +0200
Message-ID: <[EMAIL PROTECTED]>
> Hi fellow time-nuts,
>
> Stephan Sandenbergh wrote:
>
> > I also read the article posted earlier by Tom
Excellent paper, nice to see some amateurs working at home-brew still!
john
At 06:54 PM 7/20/2006, you wrote:
>Hi fellow time-nuts,
>
>Stephan Sandenbergh wrote:
>
> > I also read the article posted earlier by Tom van Baak (Thanks Tom! This is
> > indeed a very comprehensive article.) It turns o
Hi fellow time-nuts,
Stephan Sandenbergh wrote:
> 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 t
Hi Ulrich,
Thanks for the useful link.
Regards,
Stephan.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Ulrich Bangert
Sent: 01 July 2006 05:39 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Linear In
iginal Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Brooks Shera
Sent: 30 June 2006 22:54
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Linear Interpolator
Inspired by Ulrich's lead regarding the high resolution TDC, I asked th
stuff but
not at the prices of ACAM.
Regards
Ulrich
> -Ursprüngliche Nachricht-
> Von: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Im Auftrag von Stephan Sandenbergh
> Gesendet: Freitag, 30. Juni 2006 14:02
> An: 'Discussion of precise time and frequency measurem
Christopher Hoover wrote:
>> For me the catch seems to be that they are packaged in a QFN-32.
>> The pin spacing is 500 microns and the open space between the
>> solder pads is only 200 microns. Perhaps I am too timid but this
>> sounds like trouble for manual soldering, that's assuming the low
>
> For me the catch seems to be that they are packaged in a QFN-32.
> The pin spacing is 500 microns and the open space between the
> solder pads is only 200 microns. Perhaps I am too timid but this
> sounds like trouble for manual soldering, that's assuming the low
> cost PCB suppliers could mak
t;$2298. Oh well.
>
>Brooks
>
>
>- Original Message -
>From: "Ulrich Bangert" <[EMAIL PROTECTED]>
>To: "'Discussion of precise time and frequency measurement'"
>; "'Magnus Danielson'" <[EMAIL PROTECTED]>
quot;'Discussion of precise time and frequency measurement'"
; "'Magnus Danielson'" <[EMAIL PROTECTED]>
Sent: Thursday, June 29, 2006 11:41
Subject: Re: [time-nuts] Linear Interpolator
Hi Stephan,
if you need a ps resolution time interval counter for use
From: "Stephan Sandenbergh" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Linear Interpolator
Date: Fri, 30 Jun 2006 14:02:11 +0200
Message-ID: <[EMAIL PROTECTED]>
> Hi Ulrich,
Stephan,
> Thanks for the tip. And, also many thanks to Magnus for introducing me to
>
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 res
> if you need a ps resolution time interval counter for use in a project
> of your own, why not simply go out and buy you one? For example here
>
> http://www.acam.de/index.php?id=105
>
> They are not that expensive because they are made to be married with
> cheap sensors.
Ulrich, Thanks for tha
Hi Stephan,
if you need a ps resolution time interval counter for use in a project
of your own, why not simply go out and buy you one? For example here
http://www.acam.de/index.php?id=105
They are not that expensive because they are made to be married with
cheap sensors.
However, you may also
Hi,
>> So you suggest, I take the 10MHz output of my OCXO lock that to a stable
>> VCXO (say 64MHz as not to be a harmonic multiple of 10MHz) and then clock
>> my FPGA with the resultant output.
>I would rephrase that to say that you should lock your low jitter VCXO (of
>say 64 MHz) to your stab
From: "Stephan Sandenbergh" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Linear Interpolator
Date: Thu, 29 Jun 2006 13:58:06 +0200
Message-ID: <[EMAIL PROTECTED]>
>
> [Magnus Danielson wrote :
> I would not do this stuff with a clock lower than 50 MHz today. It is
[Magnus Danielson wrote :
I would not do this stuff with a clock lower than 50 MHz today. It is easy
enought to acomplish it. 10 MHz is nice and dandy for reference, but I would
use a low-jitter VCXO and lock it to the 10 MHz and then use that clock for
measurements.]
Hi,
So you suggest, I take
From: "Stephan Sandenbergh" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Linear Interpolator
Date: Thu, 29 Jun 2006 11:42:16 +0200
Message-ID: <[EMAIL PROTECTED]>
> Magnus,
Stephan,
> Regarding your suggested discrete solution (viz. current mirror, ADC, etc):
>
Magnus,
Regarding your suggested discrete solution (viz. current mirror, ADC, etc):
Will it be relatively easy to achieve 1ns resolution and a range of say
100ns (for 10MHz) with sub-nanosecond accuracy?
Regards,
Stephan Sandenbergh
___
time-nuts m
Hi All,
Thank you for all the very helpful hints and info. However, I am still
confused by some topics related to the analogue interpolator.
I can see that designing an analogue interpolator can be tricky, at least as
(or probably more) tricky than the DAC feeding the OCXO.
Question 1
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