The cutoff frequency for a high-pass filter is that frequency at which the output (load) voltage equals 70.7% of the input (source) voltage . Above the cutoff frequency, the output voltage is greater than 70.7% of the input, and vice versa.
Read moreHow do you determine HPF and LPF?
LPF circuit allows the frequency underneath cut-off frequency for flowing through it. HPF circuit allows the frequencies over cut-off frequency for flowing through it . It can be built with a resistor which is followed by a capacitor.
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