The optimum width of the injection pulse is equal to 1/2 the period of
the output frequency of the injection locked oscillator.
In this case a pulse width of around 31.25ns
Bruce
paul swed wrote:
Bruce is right about that fact. Thanks.
Square up the 10 Mhz. Diff the leading edge (It actually doesn't matter)
maybe 2-5pf cap and 300 ohm R to ground. Feed this into a transistor that
is in the bottom end of a one transistor oscillator. There are actually
several ways to inject. Think of a totem pole of 2 transistors.
Use google and do a search and you will see what I am talking about. There
were some articles that the spread spectrum hams used that describe it.
On Wed, Jan 2, 2013 at 2:48 PM, Bruce Griffiths
<bruce.griffi...@xtra.co.nz>wrote:
Since injection locking is possible when the ratio of the 2 frequencies
involved is a rational number, a 16 MHz oscillator can be directly
injection locked to a 10MHz signal without the need for dividers etc.
Bruce
paul swed wrote:
Tom.
OK the challenge simple. CD4046 16 MHz vco and div by 8 using a 2 Mhz ref.
Thats pretty easy as they say.
As an alternative and very easy 10 MHz div 2 2MHz X 4 X 2. This requires
BPF but pretty easy also.
Lastly an injection osc. 10 Mhz div to 2 Mhz differentiate and feed to a
16
Mhz osc.
Thats actually the easiest of the approaches.
Regards
Paul
On Wed, Jan 2, 2013 at 1:54 PM, Tom Van Baak<t...@leapsecond.com> wrote:
What's the simplest way to generate 16 MHz from 10 MHz? This will be for
clocking a microcontroller at 16 MHz given 10 MHz (Cs/Rb/GPSDO). Low
price
and low parts count is a goal; jitter is not a concern but absolute
long-term phase coherence is a must.
The ICS525 (as in TAPR Clock-Block) is a good candidate but I was
wondering if there's something cheaper, less functional, and maybe not
SSOP. Any suggestions?
Thanks,
/tvb
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