The discussion centers on designing a low noise 60 Hz notch filter circuit that minimizes attenuation above 100 Hz. A recommended solution is the Burr-Brown active notch filter, which includes separate low-pass, band-pass, and high-pass filters that can be combined using a summing amplifier. Participants suggest considering alternative methods to eliminate 60 Hz noise coupling before filtering, such as modulation techniques. The focus is on achieving a sharp notch filter without compromising higher frequency signals.
PREREQUISITESElectronics engineers, audio engineers, and hobbyists focused on designing low noise filter circuits for audio applications, particularly those dealing with 60 Hz interference.
m718 said:Does anyone have a very low noise 60 Hz notch filter circuit that will not attenuate over 100
or a low noise bandpass from 100 to 20000 hz .