This notch filter was found in National Semiconductor documentation from the 1980s. Operational amplifiers are from that era. The configuration can be adapted to use modern operational amplifiers.
January 2017 - Through Mouser Electronics Texas Instruments is launching its new zero-drift...
This circuit generates low-frequency sinusoidal signals. The variable capacitor is dual and the...
This rather sophisticated circuit does not recognize false tones, such as harmonics, and can be...