This circuit was found in Siliconix documentation from the 1980s. Equivalent operational amplifiers can be used and the output current is very low.
The circuit is from the Linear applications Handbook of the National Semiconductor of 1994. The...
This circuit can serve as a basis for a robot that follows a line on the ground. The circuit has...
This circuit shows how to simulate a high-performance diode with two diodes. The circuit is from a...