What does J-K in J-K flip flop indicate?
Prasad
In case of all other flip flops ,the names indicate something about their function.
R-S:Reset-Set
T:toggle
D-delay or data
then what does j-k in j-k flip flop indicate.
reply me if u know anything about this.
Bob Stephens
John Kerry!!!
Bob
Joerg
I believe that was in honor of Jack Kilby (J.K.) who invented the IC.
Regards, Joerg
Jonathan Kirwan
wrote:
>I believe that was in honor of Jack Kilby (J.K.) who invented the IC.
Shucks, and here I was hoping it might be... my name. ;)
Jon
Rich Grise
following:
It sounds so mundane, but I actually think they picked them because they
were the next letters in sequence to designate arbitrary stuff, much the
same way that they use Q for transistors, and U for ICs. E is volts, F is
Farads, G is conductance, H is hysteresis or Henrys or something to do
with the black magic of magnetics, I is duh, so J and K were next.
Hope This Helps!
Rich
JeffM
"One of the inventors" or "co-inventor".
We wouldn't want to dis Bob Noyce (a kinda Newton/Leibniz thing).
Robert Morein
"Rich Grise" <nu...@example.net> wrote in message
news:K5m8d.4324$cd1.835@trnddc03...
names of indices.
John Woodgate
wrote (in <K5m8d.4324$cd1.835@trnddc03>) about 'What does J-K in J-K
flip flop indicate?', on Tue, 5 Oct 2004:
mathematicians' favoured pairs of symbols for variables. They are
particularly used as subscripts for array variables and indexes for
summations. R and S are another such pair and there is an R-S inside the
J-K, so the choice of another such pair to describe the more complex
configuration seems logical.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
Jim Thompson
Nope. It was Jack S. who conceived of the multi-layer diffused
integrated circuit...
http://www.ti.com/corp/docs/kilbyctr/jackstclair.shtml
Noyce (and many others) applied Kilby's ideas, and often get called
the "inventor", but they were just implementers...
http://www.pbs.org/transistor/album1/addlbios/noyce.html
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Rich Grise
with the following:
> I read in sci.electronics.design that Rich Grise <nu...@example.net>
>>It sounds so mundane, but I actually think they picked them because they
>>were the next letters in sequence to designate arbitrary stuff, much the
>>same way that they use Q for transistors, and U for ICs. E is volts, F is
>>Farads, G is conductance, H is hysteresis or Henrys or something to do
>>with the black magic of magnetics, I is duh, so J and K were next.
>>
> I think it's much more likely that they are just one of the
> mathematicians' favoured pairs of symbols for variables. They are
> particularly used as subscripts for array variables and indexes for
> summations. R and S are another such pair and there is an R-S inside the
> J-K, so the choice of another such pair to describe the more complex
> configuration seems logical.
> --
I was assuming that the "R" was "Reset" and the "S" was "Set." But what
could "J" and "K" stand for? :-)
Thanks,
Rich
John Woodgate
flip flop indicate?', on Tue, 5 Oct 2004:
>I was assuming that the "R" was "Reset" and the "S" was "Set." But what
>could "J" and "K" stand for? :-)
Jog and Kick, of course. What do you think Q and Q-bar stand for? And
the D in D-type and the T in T-type.
slawc
> I read in sci.electronics.design that Rich Grise <nu...@example.net>
> wrote (in <pIz8d.4727$Sl2.2910@trnddc09>) about 'What does J-K in J-K
> flip flop indicate?', on Tue, 5 Oct 2004:
>
>
>>I was assuming that the "R" was "Reset" and the "S" was "Set." But what
>>could "J" and "K" stand for? :-)
>
>
> Jog and Kick, of course. What do you think Q and Q-bar stand for? And
> the D in D-type and the T in T-type.
Jump, Kill
Delay
Toggle
Rich Grise
following:
> John Woodgate wrote:
Data
> Toggle
Quantity. ;-)
Cheers!
Rich
Mike
Here's a post from Max Hauser (search for J-K):
http://groups.google.com/groups?selm=100ukpt83k5aq79%40corp.supernews.com&output=gplain
This version seems somewhat more likely that the oft-reported but
unsupported claim that they stand for Jack Kilby.
-- Mike --
Joerg
>This version seems somewhat more likely that the oft-reported but
>unsupported claim that they stand for Jack Kilby.
>
>
Could very well be. John Kardash is often mentioned as the inventor of
the JK flip-flop. I think he is still on the Taracom management team. So
we could ask him ;-)
Regards, Joerg
John Miles
notthis...@removethispacbell.net says...
John Kerry?
-- jm (yeah, I know...)
------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------
Max Hauser
> ...
> -- Mike --
Thank you Mike. Those of short memory, hearken `way back to
21-January and this same topic (some of the same people were
involved). Following an Old-Fart electronics quiz (re-post from this
newsgroup 17 years before, when still just sci.electronics). Or,
search under the name John J. Kardash (he shows up in the "JK FF"
context a wide range of sources, online and off). The January mention
here is accessible now via
and the list of quiz answers is here
Historical notes: [1] Should anyone actually read the original 1987
posted answers, please note that the phrase "electronics hackers"
meant "hackers" in the traditional, or pre-Hollywood, sense (much more
common in 1987 than today). I heard that exact phrase in 1974 from
the late professor David Adler who acknowledged "all sorts of
electronics hackers" at MIT. [2] Correction from January posting:
Bill Hewlett's lightweight prototype oscillator weighed 18 pounds, not
14. I lately had reason to check his Stanford thesis of June 1939.
(The 93-pound state of the art from General Radio was accurate as
stated.)
-- Max
(fiat lux / mens et manus)
uvc...@juno.com
I cannot believe that with all the politics in this group, no one has pointed
out that the J-K in a flip flop is:
J is for John
K is for Kerry
Stop hating each other for a few minutes and pay attention :-)
Ratch
<uvc...@juno.com> wrote in message
news:417e5970$1$ouf73$mr2...@giganews.aros.net...
>
>
> I cannot believe that with all the politics in this group, no one has
pointed
> out that the J-K in a flip flop is:
>
> J is for John
> K is for Kerry
That's good, really good! Ratch
Mark Zenier
Internal schematic of a Bush FF
Pwr
_____|_______
| | |
| +-------|- /Q
Data | |
---------------|-----+ |
| | |
Clock | | |
---------------|-----+ |
| | |
| +-------|- Q
| | |
|_____|_______|
|
Gnd
Notes: (1) the outputs appear as valid logic levels but never change.
(2) Any inputs that can change the output are forced to Ground.
Mark Zenier mze...@eskimo.com Washington State resident
Robert Monsen
The model needs a resistor between data and ground, because there always
seems to be lots of resistance to any new data, whether it's used or not.
--
Regards,
Robert Monsen
"Your Highness, I have no need of this hypothesis."
- Pierre Laplace (1749-1827), to Napoleon,
on why his works on celestial mechanics make no mention of God.
Marlboro
It was JFK, but the K is dropped out after he got shot.