At 09:07 PM 11/02/97 -0600, you wrote:
---snip---
>where X represents a "jittery" signal.  Any of the odd numbered signals may
>appear as either the next higher or lower value, but provided that the jit-
>tery input stabilizes before the other input starts jittering, the system
>will never lose a count.

Unless the detection circuit before the counter or CPU has some asymmetry
AND the counter/CPU is fast enough - that jitter could be up to a meg
and thats too fast for a CPU...

Rgds

Mike

All things begin with thought then it becomes academic, then some poor slob
works out a practical way to implement all that theory - this is called
Engineering.