Groups > sci.electronics.design > #458025

Re: Binary counter - please check my work

From	Jasen Betts <jasen@xnet.co.nz>
Newsgroups	sci.electronics.design
Subject	Re: Binary counter - please check my work
Date	2017-04-29 20:25 +0000
Organization	"JJ's own news server"
Message-ID	<oe2ss6$q3s$1@gonzo.alcatraz> (permalink)
References	<l1QMA.1138$aC3.305@fx02.iad> <oe0iha$10b$1@dont-email.me> <l1TMA.48233$uf1.15437@fx40.iad> <oe0vro$ogs$1@dont-email.me> <_CUMA.24965$kF7.13243@fx22.iad>

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On 2017-04-29, bitrex <bitrex@de.lete.earthlink.net> wrote:
> On 04/28/2017 11:07 PM, Don Y wrote:
>
>> There are no "steady state" consequences of this.  However, the
>> temporal behavior of the "4th bit" will vary near the clock edge
>> as it will be more closely synchronized with the other three bits
>> in the case where the state is set-up *before* the clock edge
>> vs. derived from the TRANSITIONED third bit AFTER the clock edge.
>
> It looked to me like the only sequence of transitions where one can get 
> a set of unique bit patterns where some two bits can be ANDed or ORed 
> together to get 8 mutually exclusive "1" outputs where the output is "0" 
> in all the other states.
>
> But I believe I'm wrong. 4 choose 0 + 4 choose 1 is only 5.

for 

"8 mutually exclusive "1" outputs where the output is "0" in all the other states."

use 

CD4022  (counter)

or

74xx328 (3-bit decoder)

etc.


CD4022 may power up in a confused state with 2 outputs high, but a
reset pulse or few clocks will cure that.

-- 
This email has not been checked by half-arsed antivirus software

Thread

Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-28 19:14 -0400
  Re: Binary counter - please check my work Don Y <blockedofcourse@foo.invalid> - 2017-04-28 16:20 -0700
    Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-28 19:31 -0400
    Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-28 22:39 -0400
      Re: Binary counter - please check my work Don Y <blockedofcourse@foo.invalid> - 2017-04-28 20:07 -0700
        Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 00:27 -0400
          Re: Binary counter - please check my work Don Y <blockedofcourse@foo.invalid> - 2017-04-28 22:44 -0700
            Re: Binary counter - please check my work Don Y <blockedofcourse@foo.invalid> - 2017-04-28 22:46 -0700
            Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-29 10:29 -0400
              Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 11:07 -0400
              Re: Binary counter - please check my work bill.sloman@ieee.org - 2017-04-29 20:34 -0700
                Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-29 23:43 -0400
                Re: Binary counter - please check my work bill.sloman@ieee.org - 2017-04-29 21:53 -0700
                Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-30 01:42 -0400
                Re: Binary counter - please check my work bill.sloman@ieee.org - 2017-04-29 23:28 -0700
                Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-30 20:10 -0400
                Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-30 20:26 -0400
                Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-30 21:07 -0400
                Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-30 21:20 -0400
                Re: Binary counter - please check my work bill.sloman@ieee.org - 2017-04-30 18:52 -0700
                Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-05-01 08:43 -0400
                Re: Binary counter - please check my work krw@notreal.com - 2017-05-01 13:33 -0400
                Re: Binary counter - please check my work bill.sloman@ieee.org - 2017-05-01 23:02 -0700
                Re: Binary counter - please check my work Jasen Betts <jasen@xnet.co.nz> - 2017-05-02 11:42 +0000
                Re: Binary counter - please check my work bill.sloman@ieee.org - 2017-05-02 06:10 -0700
                Re: Binary counter - please check my work upsidedown@downunder.com - 2017-05-03 03:26 +0300
                Re: Binary counter - please check my work pcdhobbs@gmail.com - 2017-05-02 18:41 -0700
                Re: Binary counter - please check my work bill.sloman@ieee.org - 2017-05-02 19:39 -0700
                Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-05-02 11:30 -0400
          Re: Binary counter - please check my work Jasen Betts <jasen@xnet.co.nz> - 2017-04-29 20:25 +0000
            Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-29 23:15 -0400
              Re: Binary counter - please check my work upsidedown@downunder.com - 2017-05-01 11:12 +0300
        Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 00:43 -0400
          Re: Binary counter - please check my work Winfield Hill <hill@rowland.harvard.edu> - 2017-04-29 05:31 -0700
            Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 09:48 -0400
          Re: Binary counter - please check my work Don Y <blockedofcourse@foo.invalid> - 2017-04-29 08:45 -0700
            Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 12:51 -0400
              Re: Binary counter - please check my work rickman <gnuarm@gmail.com> - 2017-04-29 14:54 -0400
              Re: Binary counter - please check my work Don Y <blockedofcourse@foo.invalid> - 2017-04-29 12:34 -0700
                Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 15:51 -0400
                Re: Binary counter - please check my work Don Y <blockedofcourse@foo.invalid> - 2017-04-29 21:37 -0700
            Re: Binary counter - please check my work Jasen Betts <jasen@xnet.co.nz> - 2017-04-29 20:49 +0000
              Re: Binary counter - please check my work Don Y <blockedofcourse@foo.invalid> - 2017-04-29 14:08 -0700
              Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 17:31 -0400
                Re: Binary counter - please check my work Jasen Betts <jasen@xnet.co.nz> - 2017-04-30 00:51 +0000
                Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 21:42 -0400
          Re: Binary counter - please check my work bloggs.fredbloggs.fred@gmail.com - 2017-04-29 12:17 -0700
            Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-29 15:36 -0400
              Re: Binary counter - please check my work bloggs.fredbloggs.fred@gmail.com - 2017-04-30 08:00 -0700
                Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-30 11:13 -0400
                Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-30 11:24 -0400
                Re: Binary counter - please check my work bloggs.fredbloggs.fred@gmail.com - 2017-04-30 08:30 -0700
                Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-04-30 16:06 -0400
  Re: Binary counter - please check my work Jasen Betts <jasen@xnet.co.nz> - 2017-04-29 00:04 +0000
  Re: Binary counter - please check my work bill.sloman@ieee.org - 2017-04-28 21:14 -0700
  Re: Binary counter - please check my work stratus46 <stratus46@yahoo.com> - 2017-05-01 01:51 -0700
    Re: Binary counter - please check my work stratus46 <stratus46@yahoo.com> - 2017-05-01 01:56 -0700
      Re: Binary counter - please check my work bitrex <bitrex@de.lete.earthlink.net> - 2017-05-01 13:36 -0400

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