The gain of this amplifier is given by the components indicated in the formulas next to the diagram. The power supply must be symmetrical and equivalent operational amplifiers can be used.
This configuration, found in many other circuits in this section, was obtained in a 1970s American...
This circuit for incandescent lamps was found in an American documentation from the 80s. The...
Found in old English documentation this circuit can be made with a BF245 or equivalent. Coils are...