[time-nuts] phase noise questions

Don Collie donmer at woosh.co.nz
Wed Jan 23 01:27:48 EST 2008


Just to let you all know that Steve the knife did reply to me off group - it 
is a facinating story.
Very, Very low noise to you all,........Don C.



----- Original Message ----- 
From: "Don Collie" <donmer at woosh.co.nz>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Wednesday, January 23, 2008 5:04 PM
Subject: Re: [time-nuts] phase noise questions


> Hi Steve!,
>    I know this is off topic, but I would be facinated to know why you are
> called "Steve the knife" [Please don`t tell me if it is anything
> illegal]
> Yours in extremely low noise,................Don.
>
>
>
> ----- Original Message ----- 
> From: "steve the knife" <poolshark at disinfo.net>
> To: <time-nuts at febo.com>
> Sent: Wednesday, January 23, 2008 1:22 PM
> Subject: [time-nuts] phase noise questions
>
>
>>
>>
>> Hello,
>>
>> I followed with some interest a discussion about a NIST doubler circuit
>> using matched FET's and I was wondering if you could get similar results
>> using an analog multiplier chip from Analog Devices. It would seem that
>> they take some care about device matching and have parts that work up
>> to pretty high frequencies. Of course there would need to be some
>> filtering
>> employed. Oh, and I think those parts do pretty well with temperature.
>>
>> Also, when using a doubler that is rated in dBc how do you apply that
>> number to get an expectation from a given starting dBc oscillator. So
>> if my 10 MHz clock is -125dBc and I use the NIST circuit, what would
>> I see at 20 MHz in dBc?
>>
>> thanks in advance,
>> steve
>>
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>
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