This circuit was found in documentation from the 1980s. The circuit can be implemented with other operational amplifiers and the power supply must be symmetrical. Powered with 5 V the circuit acts as an input shield for microcontrollers.

This circuit was found in documentation from the 1980s. The circuit can be implemented with other operational amplifiers and the power supply must be symmetrical. Powered with 5 V the circuit acts as an input shield for microcontrollers.