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 circuit is from the 80's component manual itself, but can be applied to more modern...
A more efficient filter is the one that diverts the signal to the ground and not only short it, as...
The figure shows the basic configurations for unijunction oscillators. They are relaxation...