This timer was found in English documentation from the 80's. The integrated circuit is common nowadays and the MOSFET admits equivalent according to the controlled load.
When a voice signal enters this circuit, the volume of the music being played automatically...
This circuit for 3.3 V logic circuits has a 5 V input and the maximum output current is on the...
We found this circuit in Motorola's 1990 Linear Databook. The component used is unusual. The...