This circuit retriggers when a new pulse arrives. It does this by discharging the capacitor. The circuit is from a documentation from the 80s. The transistor can be any general purpose one.
The integrated circuits in this application are not very common today. One consists of an A / D...
Found in the Encyclopedia of Electronic Circuits Volume 5 of 1995 this circuit has the gain...
The output power of this amplifier depends on the supply voltage that can be between 3 and 16 V....