This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is not an easy component to obtain and the power can be supplied with a single button cell.
We found this circuit in recent English documentation. The circuit uses CMOS technology and can be...
In the figure we have the way to implement an operational amplifier using common transistors such...
In this circuit, D.A. which is actually O. A. of an operational amplifier, which can be any type...