This circuit was obtained from an Analog Devices manual from the 90's. The integrated circuit is from the time.
In the figure we have the way to implement an Exclusive OR or XOR gate with CMOS or TTL...
This circuit for analog telephones from the 90s was found in documentation from the time. It...
Found in a Popular Elecronics from the 90s, this circuit appears in other versions in this section and...