Yes! I did find a patent that illustrated the exact same feedback circuit as in the EE times article. But most self-decoding ring counters in mass-produced applications use simpler lower propagation-delay gate arrangements to ensure the counter self-corrects any defective sequences. e.g. look at how the CD4017 does not use a 10 input NAND gate!!!
Tim N3QE On Fri, Nov 14, 2014 at 4:39 PM, Said Jackson via time-nuts < time-nuts@febo.com> wrote: > The premise of higher than "normal" click speed is false in the article > too because the complex NOR gate is slow with that many inputs, and its tpd > needs to be added to the Tsu and Tco of the flip flop chains, as well as > the pcb propagation delays through the worst case trace.. > > It would have been faster to simply use a single reset RC delay to reset > all FF asynchronously while only setting one FF at the same time during > power-on. That would remove the Nor gate delay from the max speed > calculation.. > > Sent From iPhone > > > On Nov 14, 2014, at 12:13, "Don Latham" <d...@montana.com> wrote: > > > > Thanks. You reminded me of the time when <design ideas> really had > content. No > > more, I'm afraid... > > Don > > > > Azelio Boriani > >> No need to digitize, the article is available here: > >> < > http://www.edn.com/design/test-and-measurement/4347165/Circuit-divides-frequency-by-N-1 > > > >> or here (in .PDF): > >> ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf > >> > >> On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts > >> <time-nuts@febo.com> wrote: > >>> List, > >>> > >>> > >>> > >>> I’ve digitized and edited an article titled* Circuit DividesFrequency > by N+1 > >>> by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*. > >>> > >>> > >>> > >>> Essentially, this circuit is expandable and allows for adivision by any > >>> number plus one. > >>> > >>> > >>> > >>> Anyone who wants a PDF copy please send me an original emailoff list. > >>> > >>> > >>> > >>> Regards, > >>> > >>> > >>> > >>> Perrier > >>> > >>> > >>> _______________________________________________ > >>> 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. > >> _______________________________________________ > >> 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. > > > > > > -- > > "The power of accurate observation is commonly called cynicism by those > who > > have not got it." > > -George Bernard Shaw > > > > Dr. Don Latham AJ7LL > > Six Mile Systems LLC > > 17850 Six Mile Road > > Huson, MT, 59846 > > mail: POBox 404 > > Frenchtown MT 59834-0404 > > VOX 406-626-4304 > > Skype: buffler2 > > www.lightningforensics.com > > www.sixmilesystems.com > > > > > > _______________________________________________ > > 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. > _______________________________________________ > 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. > _______________________________________________ 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.