Active band pass filters (BPF) attenuate frequencies below and above a range of frequencies (i.e., the bandwidth or passband of the filter). Any signal with a frequency within that band pass range ...

holding the overall (passband) gain roughly constant. For that, you’ll need a stereo / dual potentiometer, which is simply two potentiometers linked to the same shaft. With one knob, you control ...

Each pattern comprises a small number of spatial frequencies, each of which causes a specific region of frequency space to be translated into the detection passband (Fig. 1a–c). All the ...

Note the steep cut-on / cut-off wavelength of 750 and 600 nm, respectively, and the fact that each filter provides close to zero transmission for their blocked ranges and 100% for their passband. Long ...