We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994. The circuit can be adapted to use other operational amplifiers and the power supply must be symmetrical.
This circuit was found in Japanese documentation from the 1960s. It is a commercial circuit with...
This circuit with 5 V power was suggested by Motorola's Linear Databook of 1990. The circuit has...
This circuit was found in an English magazine from 1977. Signal inputs and outputs must be...