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 was found in the October 1989 issue of Radio Electronics magazine. It drives an...
The transistors in this circuit from an English publication in 1980 may be the BC548. Operational...
This is one of many circuits of this type that can be found in this section. This one is taken from...