Re: Debouncing....at About 1Mhz
- From: Fred Bloggs <nospam@xxxxxxxxxx>
- Date: Thu, 01 Nov 2007 08:42:12 -0500
This has got to be a classic signal clean up problem....
I need a circuit that triggers on edge A, then ignores about 0.1uS of
jitter then triggers on edge B and then ignores a following 0.1uS of
jitter.
+-+ +-+ +----------------+ +-+ +-+
In | | | | | | | | | |
A | | | | B | | | |
-------+ +-+ +-+ +-+ +-+ +-----------
|<0.1uS>| |<0.1uS >| |< 0.5uS >|
Out +------------------------+
| |
A' B'
-------+ +-------------
Edge A to A' is ~ less than 10nS
Edge B to B' is ~ less than 10nS
All values are approximates.
"In" and "Out" are repeating waveforms.
I think I can do it with:
1 flip flop 1 >0.1us delay circuit
Sprinkled with gates..
Or maybe I need 2 flip flops..one for edge A and one for edge B..
I'm not even sure yet which type of FF to get.
If anybody has done this problem before and doesn't mind sharing..let
me know a topology...
In the meantime, I'll be doodling until I get a solution...
It would be simpler to learn how to terminate your signals properly.
.
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