[time-nuts] Division Circuit

[Perry Sandeen via time-nuts]

List,


 
I’ve digitized and edited an article titled* Circuit DividesFrequency by N+1 by 
Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.


 
Essentially, this circuit is expandable and allows for adivision by any number 
plus one.


 
Anyone who wants a PDF copy please send me an original emailoff list.


 
Regards,


 
Perrier


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[time-nuts] Division Circuit

[Mark Sims]

Ouch!   some circuits just sound too painful to think about...  ;-)
---
The Twisted Johnson Ring Counter...   
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Re: [time-nuts] Division Circuit

[Azelio Boriani]

No need to digitize, the article is available here:

or here (in .PDF):
ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf

On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts
 wrote:
> List,
>
>
>
> I’ve digitized and edited an article titled* Circuit DividesFrequency by N+1 
> by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.
>
>
>
> Essentially, this circuit is expandable and allows for adivision by any 
> number plus one.
>
>
>
> Anyone who wants a PDF copy please send me an original emailoff list.
>
>
>
> Regards,
>
>
>
> Perrier
>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
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Re: [time-nuts] Division Circuit

[Tim Shoppa]

The ring counter has been re-invented! I'm pretty sure that particular
feedback network is in the TTL Cookbook (will have to find my copy).

Tim N3QE

On Fri, Nov 14, 2014 at 9:42 AM, Azelio Boriani 
wrote:

> No need to digitize, the article is available here:
> <
> http://www.edn.com/design/test-and-measurement/4347165/Circuit-divides-frequency-by-N-1
> >
> or here (in .PDF):
> ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf
>
> On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts
>  wrote:
> > List,
> >
> >
> >
> > I’ve digitized and edited an article titled* Circuit DividesFrequency by
> N+1 by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.
> >
> >
> >
> > Essentially, this circuit is expandable and allows for adivision by any
> number plus one.
> >
> >
> >
> > Anyone who wants a PDF copy please send me an original emailoff list.
> >
> >
> >
> > Regards,
> >
> >
> >
> > Perrier
> >
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
> > To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
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>
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Re: [time-nuts] Division Circuit

[Tim Shoppa]

https://www.google.com/patents/US3109990

On Fri, Nov 14, 2014 at 10:54 AM, Tim Shoppa  wrote:

> The ring counter has been re-invented! I'm pretty sure that particular
> feedback network is in the TTL Cookbook (will have to find my copy).
>
> Tim N3QE
>
> On Fri, Nov 14, 2014 at 9:42 AM, Azelio Boriani 
> wrote:
>
>> No need to digitize, the article is available here:
>> <
>> http://www.edn.com/design/test-and-measurement/4347165/Circuit-divides-frequency-by-N-1
>> >
>> or here (in .PDF):
>> ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf
>>
>> On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts
>>  wrote:
>> > List,
>> >
>> >
>> >
>> > I’ve digitized and edited an article titled* Circuit DividesFrequency
>> by N+1 by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.
>> >
>> >
>> >
>> > Essentially, this circuit is expandable and allows for adivision by any
>> number plus one.
>> >
>> >
>> >
>> > Anyone who wants a PDF copy please send me an original emailoff list.
>> >
>> >
>> >
>> > Regards,
>> >
>> >
>> >
>> > Perrier
>> >
>> >
>> > ___
>> > time-nuts mailing list -- time-nuts@febo.com
>> > To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> > and follow the instructions there.
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
>
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Re: [time-nuts] Division Circuit

[Don Latham]

Thanks. You reminded me of the time when  really had content. No
more, I'm afraid...
Don

Azelio Boriani
> No need to digitize, the article is available here:
> 
> or here (in .PDF):
> ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf
>
> On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts
>  wrote:
>> List,
>>
>>
>>
>> I’ve digitized and edited an article titled* Circuit DividesFrequency by N+1
>> by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.
>>
>>
>>
>> Essentially, this circuit is expandable and allows for adivision by any
>> number plus one.
>>
>>
>>
>> Anyone who wants a PDF copy please send me an original emailoff list.
>>
>>
>>
>> Regards,
>>
>>
>>
>> Perrier
>>
>>
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> ___
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> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>


-- 
"The power of accurate observation is commonly called cynicism by those who
have not got it."
 -George Bernard Shaw

Dr. Don Latham AJ7LL
Six Mile Systems LLC
17850 Six Mile Road
Huson, MT, 59846
mail:  POBox 404
Frenchtown MT 59834-0404
VOX 406-626-4304
Skype: buffler2
www.lightningforensics.com
www.sixmilesystems.com


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Re: [time-nuts] Division Circuit

[Said Jackson via time-nuts]

The premise of higher than "normal" click speed is false in the article too 
because the complex NOR gate is slow with that many inputs, and its tpd needs 
to be added to the Tsu and Tco of the flip flop chains, as well as the pcb 
propagation delays through the worst case trace..

It would have been faster to simply use a single reset RC delay to reset all FF 
asynchronously while only setting one FF at the same time during power-on. That 
would remove the Nor gate delay from the max speed calculation..

Sent From iPhone

> On Nov 14, 2014, at 12:13, "Don Latham"  wrote:
> 
> Thanks. You reminded me of the time when  really had content. No
> more, I'm afraid...
> Don
> 
> Azelio Boriani
>> No need to digitize, the article is available here:
>> 
>> or here (in .PDF):
>> ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf
>> 
>> On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts
>>  wrote:
>>> List,
>>> 
>>> 
>>> 
>>> I’ve digitized and edited an article titled* Circuit DividesFrequency by N+1
>>> by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.
>>> 
>>> 
>>> 
>>> Essentially, this circuit is expandable and allows for adivision by any
>>> number plus one.
>>> 
>>> 
>>> 
>>> Anyone who wants a PDF copy please send me an original emailoff list.
>>> 
>>> 
>>> 
>>> Regards,
>>> 
>>> 
>>> 
>>> Perrier
>>> 
>>> 
>>> ___
>>> time-nuts mailing list -- time-nuts@febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> 
> 
> -- 
> "The power of accurate observation is commonly called cynicism by those who
> have not got it."
> -George Bernard Shaw
> 
> Dr. Don Latham AJ7LL
> Six Mile Systems LLC
> 17850 Six Mile Road
> Huson, MT, 59846
> mail:  POBox 404
> Frenchtown MT 59834-0404
> VOX 406-626-4304
> Skype: buffler2
> www.lightningforensics.com
> www.sixmilesystems.com
> 
> 
> ___
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Re: [time-nuts] Division Circuit

[Tim Shoppa]

Yes! I did find a patent that illustrated the exact same feedback circuit
as in the EE times article. But most self-decoding ring counters in
mass-produced applications use simpler lower propagation-delay gate
arrangements to ensure the counter self-corrects any defective sequences.
e.g. look at how the CD4017 does not use a 10 input NAND gate!!!

Tim N3QE

On Fri, Nov 14, 2014 at 4:39 PM, Said Jackson via time-nuts <
time-nuts@febo.com> wrote:

> The premise of higher than "normal" click speed is false in the article
> too because the complex NOR gate is slow with that many inputs, and its tpd
> needs to be added to the Tsu and Tco of the flip flop chains, as well as
> the pcb propagation delays through the worst case trace..
>
> It would have been faster to simply use a single reset RC delay to reset
> all FF asynchronously while only setting one FF at the same time during
> power-on. That would remove the Nor gate delay from the max speed
> calculation..
>
> Sent From iPhone
>
> > On Nov 14, 2014, at 12:13, "Don Latham"  wrote:
> >
> > Thanks. You reminded me of the time when  really had
> content. No
> > more, I'm afraid...
> > Don
> >
> > Azelio Boriani
> >> No need to digitize, the article is available here:
> >> <
> http://www.edn.com/design/test-and-measurement/4347165/Circuit-divides-frequency-by-N-1
> >
> >> or here (in .PDF):
> >> ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf
> >>
> >> On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts
> >>  wrote:
> >>> List,
> >>>
> >>>
> >>>
> >>> I’ve digitized and edited an article titled* Circuit DividesFrequency
> by N+1
> >>> by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.
> >>>
> >>>
> >>>
> >>> Essentially, this circuit is expandable and allows for adivision by any
> >>> number plus one.
> >>>
> >>>
> >>>
> >>> Anyone who wants a PDF copy please send me an original emailoff list.
> >>>
> >>>
> >>>
> >>> Regards,
> >>>
> >>>
> >>>
> >>> Perrier
> >>>
> >>>
> >>> ___
> >>> time-nuts mailing list -- time-nuts@febo.com
> >>> To unsubscribe, go to
> >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >>> and follow the instructions there.
> >> ___
> >> time-nuts mailing list -- time-nuts@febo.com
> >> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >> and follow the instructions there.
> >
> >
> > --
> > "The power of accurate observation is commonly called cynicism by those
> who
> > have not got it."
> > -George Bernard Shaw
> >
> > Dr. Don Latham AJ7LL
> > Six Mile Systems LLC
> > 17850 Six Mile Road
> > Huson, MT, 59846
> > mail:  POBox 404
> > Frenchtown MT 59834-0404
> > VOX 406-626-4304
> > Skype: buffler2
> > www.lightningforensics.com
> > www.sixmilesystems.com
> >
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
> > To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
> ___
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> To unsubscribe, go to
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> and follow the instructions there.
>
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Re: [time-nuts] Division Circuit

[Brooke Clarke]

Hi:

The Twisted Johnson Ring Counter may be the one your looking for.
The individual stages are not clocked at the input frequency, but rather 
something like N/5.
http://en.wikipedia.org/wiki/Ring_counter#Four-bit_ring_counter_sequences
It's decodes using 2-input gates.
The last one I made used the 723 F-F from Fairchild.
http://www.prc68.com/I/comp.shtml#Lamp

Mail_Attachment --
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html
Tim Shoppa wrote:

Yes! I did find a patent that illustrated the exact same feedback circuit
as in the EE times article. But most self-decoding ring counters in
mass-produced applications use simpler lower propagation-delay gate
arrangements to ensure the counter self-corrects any defective sequences.
e.g. look at how the CD4017 does not use a 10 input NAND gate!!!

Tim N3QE

On Fri, Nov 14, 2014 at 4:39 PM, Said Jackson via time-nuts <
time-nuts@febo.com> wrote:


The premise of higher than "normal" click speed is false in the article
too because the complex NOR gate is slow with that many inputs, and its tpd
needs to be added to the Tsu and Tco of the flip flop chains, as well as
the pcb propagation delays through the worst case trace..

It would have been faster to simply use a single reset RC delay to reset
all FF asynchronously while only setting one FF at the same time during
power-on. That would remove the Nor gate delay from the max speed
calculation..

Sent From iPhone


On Nov 14, 2014, at 12:13, "Don Latham"  wrote:

Thanks. You reminded me of the time when  really had

content. No

more, I'm afraid...
Don

Azelio Boriani

No need to digitize, the article is available here:
<

http://www.edn.com/design/test-and-measurement/4347165/Circuit-divides-frequency-by-N-1

or here (in .PDF):
ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf

On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts
 wrote:

List,



I’ve digitized and edited an article titled* Circuit DividesFrequency

by N+1

by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.



Essentially, this circuit is expandable and allows for adivision by any
number plus one.



Anyone who wants a PDF copy please send me an original emailoff list.



Regards,



Perrier


___
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--
"The power of accurate observation is commonly called cynicism by those

who

have not got it."
-George Bernard Shaw

Dr. Don Latham AJ7LL
Six Mile Systems LLC
17850 Six Mile Road
Huson, MT, 59846
mail:  POBox 404
Frenchtown MT 59834-0404
VOX 406-626-4304
Skype: buffler2
www.lightningforensics.com
www.sixmilesystems.com


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Re: [time-nuts] Division Circuit

[Alan Melia]

Isn't the 10i/p gate to do the divide by N+1?? not just to avoid an "all 
zeros switch on" which does not need all 10 stages fed back if all you want 
is an N stage ring counter??

Alan
G3NYK

- Original Message - 
From: "Tim Shoppa" 
To: "Said Jackson" ; "Discussion of precise time and 
frequency measurement" 

Sent: Friday, November 14, 2014 9:53 PM
Subject: Re: [time-nuts] Division Circuit



Yes! I did find a patent that illustrated the exact same feedback circuit
as in the EE times article. But most self-decoding ring counters in
mass-produced applications use simpler lower propagation-delay gate
arrangements to ensure the counter self-corrects any defective sequences.
e.g. look at how the CD4017 does not use a 10 input NAND gate!!!

Tim N3QE

On Fri, Nov 14, 2014 at 4:39 PM, Said Jackson via time-nuts <
time-nuts@febo.com> wrote:


The premise of higher than "normal" click speed is false in the article
too because the complex NOR gate is slow with that many inputs, and its 
tpd

needs to be added to the Tsu and Tco of the flip flop chains, as well as
the pcb propagation delays through the worst case trace..

It would have been faster to simply use a single reset RC delay to reset
all FF asynchronously while only setting one FF at the same time during
power-on. That would remove the Nor gate delay from the max speed
calculation..

Sent From iPhone

> On Nov 14, 2014, at 12:13, "Don Latham"  wrote:
>
> Thanks. You reminded me of the time when  really had
content. No
> more, I'm afraid...
> Don
>
> Azelio Boriani
>> No need to digitize, the article is available here:
>> <
http://www.edn.com/design/test-and-measurement/4347165/Circuit-divides-frequency-by-N-1
>
>> or here (in .PDF):
>> ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf
>>
>> On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts
>>  wrote:
>>> List,
>>>
>>>
>>>
>>> I’ve digitized and edited an article titled* Circuit DividesFrequency
by N+1
>>> by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.
>>>
>>>
>>>
>>> Essentially, this circuit is expandable and allows for adivision by 
>>> any

>>> number plus one.
>>>
>>>
>>>
>>> Anyone who wants a PDF copy please send me an original emailoff list.
>>>
>>>
>>>
>>> Regards,
>>>
>>>
>>>
>>> Perrier
>>>
>>>
>>> ___
>>> time-nuts mailing list -- time-nuts@febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>
>
> --
> "The power of accurate observation is commonly called cynicism by those
who
> have not got it."
> -George Bernard Shaw
>
> Dr. Don Latham AJ7LL
> Six Mile Systems LLC
> 17850 Six Mile Road
> Huson, MT, 59846
> mail:  POBox 404
> Frenchtown MT 59834-0404
> VOX 406-626-4304
> Skype: buffler2
> www.lightningforensics.com
> www.sixmilesystems.com
>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
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Re: [time-nuts] Division Circuit

[Mike Feher]

Brooke -

You must have meant the 923. The 723 is a voltage regulator. I also used to 
have fun with the 900 series RTL stuff in the mid 60's. 73 - Mike 

Mike B. Feher, EOZ Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 office
908-902-3831 cell

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke
Sent: Friday, November 14, 2014 6:10 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Division Circuit

Hi:

The Twisted Johnson Ring Counter may be the one your looking for.
The individual stages are not clocked at the input frequency, but rather 
something like N/5.
http://en.wikipedia.org/wiki/Ring_counter#Four-bit_ring_counter_sequences
It's decodes using 2-input gates.
The last one I made used the 723 F-F from Fairchild.
http://www.prc68.com/I/comp.shtml#Lamp

Mail_Attachment --
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
http://www.prc68.com/I/DietNutrition.html
Tim Shoppa wrote:
> Yes! I did find a patent that illustrated the exact same feedback 
> circuit as in the EE times article. But most self-decoding ring 
> counters in mass-produced applications use simpler lower 
> propagation-delay gate arrangements to ensure the counter self-corrects any 
> defective sequences.
> e.g. look at how the CD4017 does not use a 10 input NAND gate!!!
>
> Tim N3QE
>
> On Fri, Nov 14, 2014 at 4:39 PM, Said Jackson via time-nuts < 
> time-nuts@febo.com> wrote:
>
>> The premise of higher than "normal" click speed is false in the 
>> article too because the complex NOR gate is slow with that many 
>> inputs, and its tpd needs to be added to the Tsu and Tco of the flip 
>> flop chains, as well as the pcb propagation delays through the worst case 
>> trace..
>>
>> It would have been faster to simply use a single reset RC delay to 
>> reset all FF asynchronously while only setting one FF at the same 
>> time during power-on. That would remove the Nor gate delay from the 
>> max speed calculation..
>>
>> Sent From iPhone
>>
>>> On Nov 14, 2014, at 12:13, "Don Latham"  wrote:
>>>
>>> Thanks. You reminded me of the time when  really had
>> content. No
>>> more, I'm afraid...
>>> Don
>>>
>>> Azelio Boriani
>>>> No need to digitize, the article is available here:
>>>> <
>> http://www.edn.com/design/test-and-measurement/4347165/Circuit-divide
>> s-frequency-by-N-1
>>>> or here (in .PDF):
>>>> ftp://ztchs.p.lodz.pl/PRP/PRP_2006_2007/71102di.pdf
>>>>
>>>> On Fri, Nov 14, 2014 at 8:02 AM, Perry Sandeen via time-nuts 
>>>>  wrote:
>>>>> List,
>>>>>
>>>>>
>>>>>
>>>>> I’ve digitized and edited an article titled* Circuit 
>>>>> DividesFrequency
>> by N+1
>>>>> by Bert Erickson, Fayetteville, NY from EDN 7/11/2002*.
>>>>>
>>>>>
>>>>>
>>>>> Essentially, this circuit is expandable and allows for adivision 
>>>>> by any number plus one.
>>>>>
>>>>>
>>>>>
>>>>> Anyone who wants a PDF copy please send me an original emailoff list.
>>>>>
>>>>>
>>>>>
>>>>> Regards,
>>>>>
>>>>>
>>>>>
>>>>> Perrier
>>>>>
>>>>>
>>>>> ___
>>>>> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to 
>>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>>>> and follow the instructions there.
>>>> ___
>>>> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
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>>>
>>> --
>>> "The power of accurate observation is commonly called cynicism by 
>>> those
>> who
>>> have not got it."
>>> -George Bernard Shaw
>>>
>>> Dr. Don Latham AJ7LL
>>> Six Mile Systems LLC
>>> 17850 Six Mile Road
>>> Huson, MT, 59846
>>> mail:  POBox 404
>>> Frenchtown MT 59834-0404
>>> VOX 406-626-4304
>>> Skype: buffler2
>>> www.lightningforensics.com
>>> www.sixmilesystems.com
>>>
>>>
>>> ___
>>> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>> ___
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>> and follow the instructions there.
>>
> ___
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> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>

___
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