[time-nuts] quartz oscillator injection locking
paulswedb at gmail.com
Sun Jul 20 18:41:32 EDT 2014
On Sun, Jul 20, 2014 at 8:11 AM, Oz-in-DFW <lists at ozindfw.net> wrote:
> On 7/19/2014 3:45 PM, paul swed 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.
> Paul, everything I seen done in this frequency range has been a small
> coupling cap in the base/gate of the crystal oscillator - small enough
> that the reactance was large relative to the base/gate impedance. The
> resulting injected signal amplitude was ~5-10% of the normal operating
> amplitude at the base. Lock detection was done with a mixer looking for
> DC output.
> > 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.
> > Regards
> > Paul
> > WB8TSL
> mailto:oz at ozindfw.net
> POB 93167
> Southlake, TX 76092 (Near DFW Airport)
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