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.
Found in a 90s Popular Electronics this circuit has its gain given by R2. This component can be...
This circuit was obtained in an English publication of the 80's, finding applications in...
This circuit was found in a 1977 Radio Shack documentation. The circuit is TTL, which must be...