[time-nuts] quartz oscillator injection locking

Alexander Pummer alexpcs at ieee.org
Sat Jul 19 20:33:49 EDT 2014

if you have enough buffering -- look for now noise amplifiers, which 
have low h12 [=  "backward gain " ] a quartz oscillator will not lock so 

On 7/19/2014 5:24 PM, Attila Kinali wrote:
> On Sat, 19 Jul 2014 16:45:14 -0400
> paul swed <paulswedb at gmail.com> wrote:
>> Attilla I did look at some of the documents. But none showed practical HF
>> class injection locking. Say as an example a 6 MHz xtal to a 1 or 2 MHz
>> reference.
>> It maybe as easy as a single transistor in the oscillators ground lead.
>> Always on till a brief pulse from the 1 or 2 MHz ref cuts it off. I think I
>> just talked myself into an attempt.
> Yes, most of the papers in this area are quite theoretic. So far i've
> not found anything applicable to time-nuts kind of use. Those papers
> that deal with real world injection locking are mostly for integrated
> circuits (90° phase shifter, frequency doubler or divider) and thus
> are quite specific to the environments there.
> I have not gone trough the math in detail and calculated what would
> would come out in a injection locked quartz crystal. Maybe i should sit
> down and do the math...
> 			Attila Kinali

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