How to make a positive pulse with a button?
XOR Gate method

You would use an XOR Gate with a few nanosecond delay between one of two inputs connected to the same logic input using a logic family capable of much faster rise times such as Current Mode Logic, CML  ( newer than the ECL family).


This delay could be a capacitor delay using dt= C*dV/Ic or microwave coaxial cable of a few m longer length using controlled impedance tracks to both inputs with proper impedance controls.

RC method

RC delay = 3ns using R=50 Ohms with suitable impedance controlled path to target and some threshold voltage such as 2/3 Vcc for a Schmitt Trigger IC input, the RC delay is almost the same with T @ 64% = 3 ns = RC=  50 * 60 pF .

The cable to the switch must be low impedance , coax or twisted pair to switch and then connected  V+ and series cap with 50 Ohms  to ground.







simulate this circuit &ndash; Schematic created using CircuitLab

This circuit has a sub-ns time to 5V with a decay time of C1R2 = 5ns with a contact button debounce time of R2C2=10ms which is more than adequate.