Found in a Popular Electronics from the 90s, this circuit can be adapted to use modern operational amplifiers. The output voltage is the square root of the input voltage.
The circuit shown bellow is na áudio amplifier using Darlington transistor in a complementary...
We found this circuit in an old American documentation. The circuit is suitable for motorcycles and...
This circuit was found in an Electronics World magazine from 1990. The circuit can be mounted...