[time-nuts] Low phase noise VCO

[Max Robinson]

If you start with a square wave odd order is all you can get but if you 
start with a pulse with a 25% duty cycle you can get even order.  It's best 
to optimize the pulse width for the harmonic you want.

Regards.

Max.  K 4 O D S.

Email: max at maxsmusicplace.com

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----- Original Message ----- 
From: "Nick Foster" <bistromat at hotmail.com>
To: <time-nuts at febo.com>
Sent: Tuesday, February 09, 2010 6:35 PM
Subject: Re: [time-nuts] Low phase noise VCO


>
>> From: bill at iaxs.net
>> To: time-nuts at febo.com
>> Date: Tue, 9 Feb 2010 18:24:39 -0600
>> Subject: Re: [time-nuts] Low phase noise VCO
>>
>> Which leads me to ask a novice question:
>>
>> Why not pull a 16 MHz crystal and multiply to 64 MHz?
>>
>> If you count down from 64 to 10 MHz, isn't the multiplication inside the
>> PLL?
>>
>> Perhaps the noise is multiplied by 4, but would it work for the intended
>> purpose?
>>
>> Bill Hawkins
>
> Can you do x4 multipliers? I thought odd-order harmonics were usually used 
> for multipliers. I'd be happy to be wrong!
>
> Nick
>
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