In the figure we have the way to obtain the Exclusive-OR function with 1 transistor. The circuit is from a 1964 Electronic Design. The transistor can be any general purpose PNP.
Using the CA3140 in the figure we have a comparator that goes low in the window voltage space. The...
With this circuit it is possible to connect a comparator to a power stage via two wires. The...
This simple circuit was found in the May 1979 issue of Radio Electronics magazine. The circuit has the...