This circuit with the XR2206 IC squares the value of a voltage. The circuit was published in the April 1978 issue of Radio Electronics magazine and should be powered by a symmetrical 15 V source.
We find this circuit in an old documentation, but it can be made using modern transistors. The circuit...
We found this circuit in a spy book from the 90s. Transistors admit equivalents and the coil can...
The circuit shown was found in an American documentation from 1964. The circuit uses transistors of...