The circuit shown is from Motorola's 1990 Linear Databook. Shaded components are optional. The characteristics of the coils are given next to the diagram.
This circuit requires an input current of only 20 fA (femto amps) which corresponds to a...
The LM359 is a Norton amplifier not common today. The presented configuration has 1000 voltage gain....
Indicated for 12 V systems, this circuit was obtained in a 90s Siliconix documentation. The...