Found in Maxim's documentation from the 90's, this circuit uses a component from the time and has its performance curve shown next to the diagram.
Originally, this 2000 documentation circuit was created to operate as a sensor for the parallel...
For those who have multimeters that do not test transistors, in the figure we have a circuit that...
Used with infrared remotes at the time, this circuit was found in a 1991 RE Experimenter Handbook....