Found in American documentation from 1969, this circuit operates in the frequency range 10 to 150 Hz providing signals as shown in the diagram itself.
We found this circuit in a 1965 Electronic Design. Transistors are still common but admit...
Found in Popular Electronics of January/February 1969, this transmitter has a few meters range and can...
The voltage gain of this circuit found in the 1982 SGS Linear Integrated Circuits manual is 10...