This differentiator for the positive front of the input signal can be elaborated based on any operational amplifier. The characteristics will depend on the components.
This circuit is from an Electronic Design from the 90's. The main integrated circuit is uncommon...
This circuit is from an Electronics Now from August 1995. The triac is according to the load that...
This timer activates a relay after a time interval of up to 15 minutes has elapsed, starting from...