Re: DTMF Decoder Project

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1 total messages Started by John Cooley Thu, 23 Jul 1992 15:19

#11

Author: John Cooley
Date: Thu, 23 Jul 1992 15:19

45 lines
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> From: shing@spot.colorado.edu (Shing Pui-Shum Benson)
>
> Okay, does this sound complicated yet?  Let me show you what I want remapped:
>  
>  _         _    _         _         _    _    _                    _
> | |    |   _|   _|  |_|  |_   |_     |  |_|  |_|   _    _   |_|   |_  |_
> |_|    |  |_    _|    |   _|  |_|    |  |_|    |  |_    _|         _  |_  blank
>  
> 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
>            _    _         _         _    _    _    _              _         _
>  _|    |   _|   _|  |_|  |_   |_     |  |_|  |_|  | |   _    _   |_|  |_   |
> |_|    |  |_    _|    |   _|  |_|    |  |_|    |  |_|   _|  |_   | |  |_|  |_
>  
> How's that?  I was thinking of screwing with a bunck of AND, OR, NAND and NOR
> gates to help me with this IF-THEN type of remapping, but maybe someone else
> has a better idea (aside from "SCRAP IT!" and "GIVE UP" :)
>  
> Any and all replies appreciated...
>  
>                 Shing


Shing,

	This is not an especially challenging task for any engineering
type person to solve.  (You'll probably find an optimized and completely
detailed solution to this if you just walked into your school's EE Department
- most Sophmore or Juniors are knowledgeable enough to not botch something
as simple as this up!)

	But what they may miss is that you've defined your "6" and "b"
to look exactly alike!
					- John Cooley
					  ASIC Designer & CAE Grunt

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