As part of the D/M project the counter uses a 100 MHz VCO with an AD 4001
PLL. To simplify further I would like to consider a very simple VCXO, easily
available components, no tuning, any ideas out there. For once phase noise
is of no concern.
Bert Kehren
Hello Bert,
That rationale sounds suspiciously familiar. The quest for an ever simpler VCO,
that is. At the expense of some additional phase noise compared to VCXO+PLL, you
could use an ADF4360-9. It is readily available at for example digikey,
currently
for $6.26.
For my fpga based counter
A circuit design? Look for 96MHz variants. Many out there.
Example:
http://www.qsl.net/dk1ag/96mhz_e.pdf
- Henry
--
ehydra.dyndns.info
ewkeh...@aol.com schrieb:
As part of the D/M project the counter uses a 100 MHz VCO with an AD 4001
PLL. To simplify further I would like to consider a
Thanks for the info Fred
The problem is the package. Looking at the Cirrus Logic CS 2300-CP and use
a bubbler. Since I start out with 5 or 10 MHz there must be something out
there that can be soldered.
In a message dated 2/25/2011 7:17:42 A.M. Eastern Standard Time,
tijddin...@yahoo.com
Well, I know Geraldo Lino de Campos on this list is using an ICS670-03 for
this purpose. For me personally that part is too jittery by about a decade,
but for your purpose it might just be the right compromise. Certainly has a
friendlier package.
datasheet:
Bert, first of all I'm really happy you're digging into this -- it's
been on my list of projects for someday for a long time!
One thing working in your favor is that the actual BFO frequency is way
down at audio; the BFO crystals at around 2 MHz are divided by 1000
before hitting the mixer.
On 2/25/11 3:05 AM, ewkeh...@aol.com wrote:
As part of the D/M project the counter uses a 100 MHz VCO with an AD 4001
PLL. To simplify further I would like to consider a very simple VCXO, easily
available components, no tuning, any ideas out there. For once phase noise
is of no concern.
Bert
Thanks for the input, do not forget the total system cost has to be $200,
the latest version has a simple VCO but I would like to eliminate component
selection, may stay with the present design, but the Cirrus CS 2300
followed by a bubbler may be the answer. Maybe there is something like the
I need to multiply by 10 and 20, 670-2 can not multiply by 20.Thanks.
Bert
In a message dated 2/25/2011 8:03:55 A.M. Eastern Standard Time,
tijddin...@yahoo.com writes:
Well, I know Geraldo Lino de Campos on this list is using an ICS670-03 for
this purpose. For me personally that part
assumes you don't mind QFN packages. You know, the little buggers with 0.5
mm pitch and no pins.
Have you seen SchmartBoards I think with one of those you could
solder QFM with eyes closed, literally. Hard to describe how they
work but the board is milled so the chip fits in sort of like in
Hello Chris,
No I didn't know SchmartBoards, thanks for the tip.
Although maybe I am missing something... I just checked their site, and
watched the videos, but I couldn't find anything I'd spend $12 on.
When you say that it is expensive at $12 each, but you need only one,
do you mean that as
English and fingers are not perfect and I did not check before I send it
sorry about that
Bert Kehren
In a message dated 2/25/2011 10:50:03 A.M. Eastern Standard Time,
tijddin...@yahoo.com writes:
Pardon my ignorance, but what is a bubbler? Is that time-nut speak for a
frequency
On Fri, Feb 25, 2011 at 11:02 AM, Tijd Dingen tijddin...@yahoo.com wrote:
Hello Chris,
No I didn't know SchmartBoards, thanks for the tip.
Although maybe I am missing something... I just checked their site, and
watched the videos, but I couldn't find anything I'd spend $12 on.
When you say
Boy even though they are $12 for larger packages I would need them. It is so
easy to create solder bridges. I can get away with direct connections to 14
pin or less and honestly have to say about 10. It seems crazy because the
micro as an example might be $5. But thats the reality.
regards
Paul
Hm. Concerning the CS2x00. Is there a PC software available to program
it via i2c? I mean without this IDT monster software.
Any hint is welcome!
- Henry
ewkeh...@aol.com schrieb:
Thanks for the info Fred
The problem is the package. Looking at the Cirrus Logic CS 2300-CP and
use
a
Heh, I could care less about typos. I just honestly didn't understand what
you meant. The best matches I could come up with was bubble counter and
doubler. And since a bubble counter made no sense in this context and a
doubler did, I thought I'd go with that guess and run with it.
So now with
hand soldering those. ;)
- Original Message
From: paul swed paulsw...@gmail.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Fri, February 25, 2011 9:51:03 PM
Subject: Re: [time-nuts] VCXO help
Boy even though they are $12 for larger packages I would
That's a bit of an open question since it depends on many things. So
I realize this may be a bit too generic, but hey you said any hints ;).
Simple example that I know to work in linux, and the same principle should
work in windows.
1 - make i2c interface with parallel port + couple of
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