This high impedance amplifier is from 1985 documentation by General Electronic. The amplifier with FET at the entrance is from the period and the source is 9 V.
In the figure below we have the typical circuit of an automotive star alternator with the...
This simple pass-through circuit was obtained in an old documentation, but it is still up to date...
This circuit was obtained in a 1974 National Semiconductor components and circuits manual. The...