An oscillator can be injection locked to at frequency that is a rational number (M/N where M, N are integers ) multiplier of the injection frequency. Thus, in principle, a 32768Hz oscillator can be injection locked directly to a 10MHz signal (32768Hz = (256/78125)*10MHz) without requiring any external dividers or multipliers. In practice this will only be practical with a 32768Hz crystal oscillator whose frequency determining crystal is tuned sufficiently closely to 32768Hz. Note this is not quite the same as tuning the free running oscillator frequency. The sensitivity to the injected signal can be optimised if the 32768Hz oscillator is suitably designed.
The 32768Hz injection locked oscillator output can be used to injection lock another 32768Hz crystal oscillator whose design cannot be optimised for direct injection locking to a 10MHz signal. Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.