An easy way to conceptualize active filters is thinking about audio speakers. A speaker crossover has a low-pass, high-pass and band-pass effect breaking a signal into three components based upon ...

The WEA228HPFA18BT122G is an active High Pass filter with variable frequency and variable gain. The cutoff frequency can be set from 2 MHz to 27.5 MHz ...

The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. It has a cutoff frequency of 18 Hz. This filter has a very sharp cutoff character. Frequencies blow 10 Hz ...

A filter that blocks low frequencies and allows higher frequencies to pass through. Such filters are used in devices such as POTS splitters that direct phone and DSL signals to different lines.