This circuit was found in National Semiconductor documentation from the 90s. The circuit uses two sensors, one of which is a reference thermocouple for cold junction.
This voltage regulator was obtained in the SGS manual of linear integrated circuits of 1982. The...
Of course, the design indicates a specific application for a touch switch. Thus, analyzing the...
In the figure we have the way to obtain the Exclusive-OR function with 1 transistor. The circuit...