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.
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