FIech
Newbie level 2
Hi,
I searched for a similar topic, but all I could find were some unanswered threads and because I don't necessarily want to hijack someone's topic and I also have an approach, I started my own.
But now to my problem. I have to stretch an UWB pulse with some hundred ps up to at least 2.5ns (my TDC has this minimum input pulse width). The amplitude of the pulse can be easily adjusted, so no problem there.
Well I thought, perhaps I can abuse the propagation delay of a flip flop to stretch my incoming pulse to a much wider one.
My idea is to feed the outgoing signal back to the reset pin of the flip flop which has a propagation delay of about 3.5ns.
This would be this one: sn74lvc112ad by Texas Instruments. The Data Sheet can be easily found over Google (I'm sorry, but I cannot post links yet and don't want to be banned because of cheating this link into the post by removing the protocoll prefix).
But honestly I'm a little unsure about the minimum pulse width mentioned in the data sheet which would be 3.3ns. On the other hand I have read that this only concerns the clock and not the actual input pulse.
I don't have much experience in flip flops, so perhaps could someone tell me if this would even work or otherwise help me obtaining my goal
Best,
Fiech
I searched for a similar topic, but all I could find were some unanswered threads and because I don't necessarily want to hijack someone's topic and I also have an approach, I started my own.
But now to my problem. I have to stretch an UWB pulse with some hundred ps up to at least 2.5ns (my TDC has this minimum input pulse width). The amplitude of the pulse can be easily adjusted, so no problem there.
Well I thought, perhaps I can abuse the propagation delay of a flip flop to stretch my incoming pulse to a much wider one.
My idea is to feed the outgoing signal back to the reset pin of the flip flop which has a propagation delay of about 3.5ns.
This would be this one: sn74lvc112ad by Texas Instruments. The Data Sheet can be easily found over Google (I'm sorry, but I cannot post links yet and don't want to be banned because of cheating this link into the post by removing the protocoll prefix).
But honestly I'm a little unsure about the minimum pulse width mentioned in the data sheet which would be 3.3ns. On the other hand I have read that this only concerns the clock and not the actual input pulse.
I don't have much experience in flip flops, so perhaps could someone tell me if this would even work or otherwise help me obtaining my goal
Best,
Fiech
Last edited: