This circuit was originally intended to operate with a solar source for experiments. Transistors are general purpose, and the output current is relatively low.
Although it is a common configuration today, this circuit was taken from an old publication. The...
In the figure we have the way to implement a 3-Input logic function OR inputs using common diodes....
We found this circuit in a 1977 National Semiconductor Databook. The circuit can use other FETs...