[time-nuts] 64MHz derived from 10MHz

Bruce Griffiths bruce.griffiths at xtra.co.nz
Wed Feb 10 01:05:14 UTC 2010

Murray Greenman wrote:
> Now I realize I'm known as an injection locking fan, but here's my 2
> cents worth:
> Divide 10MHz by 5 to 2MHz using a Johnson ring counter (74HC4017). Use
> that to injection lock a 64MHz XO. A low noise solution and no PLLs
> required.
> I'd not be surprised if you could injection lock directly with 10MHz.
> 73,
> Murray ZL1BPU
You can even build an injection locked divide by 5 stage.
Choosing the right oscillator topology and injection method allows high 
level injection to be used with an LC oscillator.


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