Although it offers attenuation to high-frequency signal too but the attenuation factor is so small that it can be neglected. In communications circuit as anti-aliasing filter.Ī high pass filter attenuates the low-frequency signal and allows only high-frequency signal to pass through it. In audio amplifiers, low noise amplifiers etc. It is significant in removing aliasing effect. It is significant when the distortion due to low frequency signal such as noise is to be removed. It consists of resistor followed by capacitor. It consists of Capacitor followed by a resistor. It is a circuit which allows the frequency below cut off frequency to pass through it. It is a circuit which allows the frequencies above cut off frequency to pass through it.
Let’s discuss other significant differences with the help of comparison chart. So far we have discussed the crucial difference between high-pass and low-pass filter along with the components which make it active or passive. While if you are planning to use the amplifier in your filter circuit to increase the gain of the filtered signal, then you are designing a filter which can be termed as an active filter. the resultant filter will be termed as the passive filter.
The point to be noted here is if you are utilizing the passive components such as a resistor, capacitor etc. If you are designing a filter, either high pass filter (HPF) or low pass filter (LPF), you need electronic components such as a resistor, capacitor, amplifier etc. The low pass filter offers low reactance to the signals with frequencies lower than the cut-off frequency so that low frequencies can pass but it provides high reactance to the high-frequency signal and thus block them.īefore embarking on the operational mechanism of the filter, let’s put light on the components of the filter.
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