Active High Pass Filter
A high pass filter will allow the frequencies which are higher than the cut-off frequency and attenuate the frequencies lower than the cut off frequency. In some cases this filter is also called as low-cut filter or case-cut filter. The amount of attenuation or the pass band range will depend on the designing parameters of the filter.
The basic operation of the active high pass filter is same as passive high pass filter, except the main difference is that the active high pass filter uses operational an amplifier which provides amplification of the output signals and controls gain.