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.
This circuit generates clear signals in harmonics that can be used for testing mid-wave radios. The...
We found this circuit in Texas Instruments documentation from 1986. The circuit produces a...
This circuit using an Unijunction Transistor produces a 240 Hz saw tooth signal. The frequency...