Question on Logic Gates

[vicebay]

Hi, I would like to ask if anyone know a circuit or an IC that has
the following characteristic.

single input -- single output

The output should only be triggered by a positive (1) input and will
not change even if the input changed it state to 0. But when the
input changed in state to 1 again, the output should change in state.

I would like to implement this on my design in a sequential light.

TIA

-vicebay

 

[Randy Day]

Geir Klemetsen wrote:

"Terry Pinnell" <terrypinDELETE@THESEdial.pipex.com> skrev i melding

- cut -


Here's a circuit using Jamie's suggested approach:
http://www.terrypin.dial.pipex.com/Images/4013FF.gif



And this is an alternative:


.---------------------.
| |
| | Output
| .--o--. |
.-----. | .-----|J S Q|-----o--------o
| G | | | -|> | __ __
|_-_-_|----------o---)-----|K R Q|o ---. __ __ __
| | | '--o--' |
'-----'Input | |
| |
'-----------------'
(created by AACircuit v1.28 beta 10/06/04 www.tech-chat.de)

But you've got the input connected to the Q output.
That'll let the magic smoke out.

I assume you meant for the input to go to the
clock pin in the middle?

 

[Geir Klemetsen]

"Randy Day" <ruthal@sasktel.nex> skrev i melding
news:10nvht07g4gkf0d@corp.supernews.com...

Geir Klemetsen wrote:
"Terry Pinnell" <terrypinDELETE@THESEdial.pipex.com> skrev i melding

- cut -


Here's a circuit using Jamie's suggested approach:
http://www.terrypin.dial.pipex.com/Images/4013FF.gif



And this is an alternative:


.---------------------.
| |
| | Output
| .--o--. |
.-----. | .-----|J S Q|-----o--------o
| G | | | -|> | __ __
|_-_-_|----------o---)-----|K R Q|o ---. __ __ __
| | | '--o--' |
'-----'Input | |
| |
'-----------------'
(created by AACircuit v1.28 beta 10/06/04 www.tech-chat.de)

But you've got the input connected to the Q output.
That'll let the magic smoke out.

I assume you meant for the input to go to the
clock pin in the middle?

Eh, of course. I was a little bit fast here.