This 50 Hz rejector or notch filter was found in a 1975 documentation. Other frequencies can be obtained by changing components. The filter uses a Wien network and must use a symmetrical power supply.
The circuit shown is from the GE semiconductor manual of 1977. In the table we have the values of the...
This circuit for 3.3 V logic circuits has a 5 V input and the maximum output current is on the...
This circuit was found in a 1960s General Electric unijunction transistor manual. The circuit can...