steph.rey at wanadoo.fr
Mon Sep 15 15:52:10 EDT 2014
Thanks for the details.
This miniaturized device is nice.
There is no information regarding stability. Anything there ? What's the
technology inside ? crystal, TCXO ?
What is the approx price for a such device ?
The VCXO I was targetting is this one :
This should bring more or less the same level of PN once multiplied than
However the frequency accuracy is poor and it needs to be disciplined in
De : SAIDJACK at aol.com [mailto:SAIDJACK at aol.com]
Envoyé : lundi 15 septembre 2014 18:51
À : steph.rey at wanadoo.fr; time-nuts at febo.com
Objet : Re: [time-nuts] newcomer
I have a similar issue, I can never tell if my messages post or not, some I
get back instantly others never show up in my inbox. I think the mail server
was just updated..
To answer your questions:
1) attached is the PN plot of the 1.0GHz version.
2) Here is a datasheet for the part:
The tricky part in your proposed setup will be getting a 100MHz crystal with
low enough phase noise so that the 20log(N/M) added phase noise won't be a
problem - +20dB added after all.
On our part some of the tricky design issues were size and power as well as
the high output power of +22dBm, and a requirement to maintain the output
power to within 0.5dB over the entire -40C to +85C temperature range.
In a message dated 9/15/2014 09:40:37 Pacific Daylight Time,
<mailto:steph.rey at wanadoo.fr> steph.rey at wanadoo.fr writes:
It sounds like all my messages need moderator approbation. Is it the
rule on the list or a technical problem at my side ?
On Mon, 15 Sep 2014 09:17:01 -0700, Said Jackson via time-nuts
< <mailto:time-nuts at febo.com> time-nuts at febo.com> wrote:
> Hi Stephanie,
> Welcome to the list!
> We designed a 1GHz crystal LO for PLLs (the ULN-1G) using an off the
> shelf miniature 500MHz crystal oscillator which is run at 3 rd
> overtone internally then using a diode doubler and a steep bandpass
> filter using several Mini Circuits ceramic filters and a 20dBm amp.
> Works like a charm and has phase noise very close to theoretical..
> Sent From iPhone
>> On Sep 15, 2014, at 5:50, "steph.rey" < <mailto:steph.rey at wanadoo.fr>
steph.rey at wanadoo.fr> wrote:
>> Hi the list,
>> Just wanted to introduce myself for my 1st message.
>> I'm Stephane, 40, living in France, at the moment working in RF &
>> electronics for a particles accelerator lab. I'm hamradio as well, and
>> I do enjoy especially weak and accurate signals.
>> I'm desiging various RF circuits. Current design is a universal PLL
>> able to operate from 0.5 to 6 GHz depending on the VCO and supposed to
>> be "low-jitter" (<1ps) regarding the application.
>> I'm also starting a new design of low noise PLL and there will be
>> probably a lot of question arising... I'm starting with the 1 GHz LO
>> made upon a 100 MHz VCXO + multipliers/filters/MMICs.
>> I want to focus deeper on low phase noise/jitter, synchronization
>> and low-noise PLL techniques.
>> I believe this is a good place for most of these topics.
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