High Pass Filter Graph. In high pass filter all frequencies lying below the cutoff frequency fc are attenuated. At this cut off frequency point we get 3db gain and at this point reactance of the capacitor and resistor values will be same i e.
A high pass filter is such a filter which only allows frequencies with high magnitude to pass through them and block the lower frequencies as the name suggests. A high pass filter also known as a low cut filter or bass cut filter is an electronic filter that permits signals with a frequency higher than a certain cutoff frequency and attenuates signals with frequencies lower than the cutoff frequency. In high pass filter all frequencies lying below the cutoff frequency fc are attenuated.
High pass filter frequency response or high pass filter bode plot.
The above circuit uses two first order filters connected or cascaded together to form a second order or two pole high pass network. Amplitude and phase response curves for the high pass filter are shown in figure 4. It forms a high pass filter because of the reactive properties of an inductor. As simple high pass filter is shown in the figure below.
