You can use one of the Silabs 8051 microcontrollers. They run one clock per instruction (for the 1 byte instructions like NOP) so dividing by 81 should not be a problem. I use them extensively to make programmable dividers. My favorite small package is a SO-14. They have much smaller devices but they are in "no pin" packages. They do not have DIP. If you are interested, I can probably jury rig one for you this weekend, I have a bunch of them on hand. The small devices run at up to 25 MHz and run at 3.3V.
Didier KO4BB. On Thu, Jun 18, 2020, 10:42 AM Gilles Clement <[email protected]> wrote: > Hi > I need to divide the output of an OCXO by a factor D=81 for testing > purposes. So with minimum added phase noise. > PICDIV-like approches would not work (D needs to be divisible by 8 or at > least be even) > I went through the archives and it seems that an Injection Locked > Frequency Divider with resynchronization flip-flop could be a simple and > acceptable solution. > As described in the following Wenzel paper: Unusual Frequency > Dividerswww.wenzel.com › uploads › dividers < > https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwik49qGpIvqAhURahQKHTBVClAQFjABegQIARAB&url=http%3A%2F%2Fwww.wenzel.com%2Fwp-content%2Fuploads%2Fdividers.pdf&usg=AOvVaw2m-9lURROiSbG9XykiDNDU > > > Does this make sense? > Gilles. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
