If you’ve used active highpass filters, I’d love to hear about it in the comments. Am I missing obvious applications? The bandpass simply cascades a highpass and a lowpass. This circuit isn ...

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 ...

An electronic circuit that accepts a signal and filters out unwanted frequencies, allowing only a particular frequency or frequency range (band of frequencies) to reach the output side.

Here I discuss the filters and dichroic mirrors ... coating on any surface not used for bandpass coatings. Although standard laser applications work very well using float glass as the substrate ...

Bandpass filter (BPF) is two coupled circuits with capacitive external coupling. There are two modes for cut-off frequency programming: manually or automatically. In automatic mode one of the circuits ...