The circuit is of the Motorola Linear Databook of 1990. The power source must be symmetrical and the characteristics of the circuit are given next to the diagram.
This circuit was found in a Popular Electronics of the 90's. The circuit makes use of common...
We found this circuit in a 1997 publication, but by the components used it can still be assembled today...
This circuit was found in a 73 magazine for radio amateurs from the 90s. The circuit uses high...