Home » Interference and Filtering Interference and filtering: (3 questions) Causes and remedying of key-clicks. Causes and recognition of cross modulation, unwanted harmonics. Definitions of low-pass, band-pass, band-reject, notch and high-pass filters. Using filters for interference reduction. EMC concepts. Causes and reduction of BCI, TVI. Gain, impedance, basic properties of operational amplifiers. Op-amps in active filters. Start 1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30