I'm working on a project where I have a pulse that stays high for a certain duration, as shown in the figure below. What I need is a circuit or IC that can maintain this high pulse continuously until I press a reset button (or apply another control signal like OV or 5V).

In short, the pulse should stay high indefinitely until the reset condition is triggered.

Can anyone suggest a circuit design or IC that can latch the pulse in this way? Any guidance or recommendations would be highly appreciated!

Looking forward to your thoughts and suggestions!

 

A FF/latch such as the CD4013 should work.
You can use the set and clear inputs for your purpose.

 

In short, the pulse should stay high indefinitely until the reset condition is triggered.

What will this High output pulse be connected to?
Should this High output pulse be at the same voltage level as the trigger pulse?
What supply voltages are available?
One suggestion:

 

The sample circuit you show should work as you want it to if you connect the SCR and its load across a dc supply - the SCR will then remain conducting until the load current is interrupted.

 

That original circuit looks like a GFI (ground fault interrupter) and those devices do a solid hard latch that requires a mechanical reset.
SO I am suggesting that the TS needs to provide a lot more detail about the application before any more suggestions, because a GFI system is potentially a "LIFE CRITICAL SYSTEM"!!!

 

What will this High output pulse be connected to?
Should this High output pulse be at the same voltage level as the trigger pulse?
What supply voltages are available?
One suggestion:
View attachment 340537

The high output pulse will be connected to gate of scr.
Yes this high pulse should be at same voltage level.
Supply voltages are 5vdc, 20 vdc and 120vac.
Thanks for your suggestion with 555 timer. I think jk flip flop will also be used to reduce the circuit.

 

With transistor latch:

The T3 that resets the latch to outputs Low can be replaced with manual button.
SET and RESET are active with logic High (5V).

 

Twice as many parts as the 555 but OK I guess.

 

It still does not make much sense to me, WHAT are you trying to accomplish?? And the circuit still looks like a ground fault interrupter. SO just what is the goal?????