pulse width extender

[fateme mrbs]

It says in the paper that it's a pulse width extender. but how does it work (and give tht result)? What is that dc current source for? It doesn't extend the input pulse width based on my simulation.

[Rerouter]

It leaves out many of the assumptions, And personally playing with it, It appears pretty horrible,

For this application, 2 Open Collector Not Gates make more sense, pulling down an RC network, However My personal favorite is linked below, I use it in a modified form to shape automotive frequency input signals.

Falstads Circuit Simulator

[eb4fbz]

http://jcoppens.com/radio/prop/stretcher/index.en.php

[coppercone2]

LTC timerblox have this function too for signals maybe up to 3MHz IIRC

[fateme mrbs]

It leaves out many of the assumptions, And personally playing with it, It appears pretty horrible,

Why does it look horrible?
Actually it worked for an input like the first picture. But not for an input like the second picture. and I am trying to demodulate the second picture. Why is that so?