Hi I was thinking purely about speed and the apparent need to get the counter running at THz rates. A divide by 10^7 Johnson counter would be a bit large. Except for the feedback issue, it could be quite fast.
Bob On Apr 16, 2010, at 12:26 AM, jimlux wrote: > Bob Camp wrote: >> Hi >> The only real limit on a Johnson counter is how clever you get making sure >> that only one stage is a 1 and all the rest are zeros. There are *lots* of >> ways to take care of that, each with it's own set of trade offs. Bob > > > Of course, if your goal is "minimizing gates" or "minimizing transistors", > particularly if you need 1 out of N decoding.. a ring/Johnson counter might > be a better strategy than a smaller counter with lots of states and more > complex decoding. > > But, if "counting" or "addressing", then standard counters or LFSRs are > better. The LFSR with multiple feedback is nice because every stage is > identical. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
