Found in Analog Devices documentation, this circuit is used in measurement bridges to linearize the signals when approaching equilibrium. Formulas are given next to the diagram.
This circuit was found in a 1967 Raytheon manual. The transistors are from the time. Equivalent modern...
This circuit was published in a 1979 magazine, but it can still be easily assembled as the...
The circuit presented generates short pulses. This configuration was found in a publication from...