Suggested by Siliconix in documentation from the 90s, this circuit can present gains of digitally selected by the input going from 1 to 1000. The circuit can be adapted to work as a shield.
We found this simple toy organ circuit in the February 1968 issue of Radio Electronics magazine. The...
In the figure we have a practical circuit for use with a magnetic transducer. The 20 M ohms...
This circuit was found in a Motorola documentation from the 70s. The components are from the time,...