This circuit is from the Linear Applications Handbook of the National Semiconductor of 1994. Transistors are common, but the integrated circuit is not easy to obtain today.
This circuit was found in a 1967 American documentation. The circuit uses components of the time,...
This circuit for several frequencies was obtained in an American documentation from the 90s. The...
We found this circuit in a Popular Electronics of the 80's. The circuit can be used to drive...