The WEA228HPFP18BT122G is a passive High Pass filter with programmable cutoff frequency from 2 MHz to 27.5 MHz with less than 10.5 % residual absolute error after ...

For those who don’t design audio circuits full-time, a Bessel filter is a linear, passive bandpass filter that preserves waveshapes of signals that are within the range of the filter’s pass ...

What to keep in mind, and what to avoid Breathe Easy’s Aggarwal points out the methodologies of passive and active air filtration, and why one needs to be “avoided like a plague”, as he puts it.