Why do cutoff frequencies of a high-pass digital filter differ from the ones i used to transform it from a low-pass analog filter in MATLAB?

1. What determines the cutoff frequency in a high pass filter?
2. What is the difference between a low cut and a high pass filter?
3. What effect does the low pass cut off frequency have on the filter?
4. Do high and low pass filters have the same cutoff frequency?

What determines the cutoff frequency in a high pass filter?

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.

What is the difference between a low cut and a high pass filter?

There are two types of pass filters (Fig. 1). A high-pass filter (HPF) attenuates content below a cutoff frequency, allowing higher frequencies to pass through the filter. A low-pass filter (LPF) attenuates content above a cutoff frequency, allowing lower frequencies to pass through the filter.

What effect does the low pass cut off frequency have on the filter?

The lowpass filter allows frequencies below the cutoff point of 2500 Hz to pass through unaffected. The figure below shows a sawtooth wave. The filter is open, with cutoff set to its maximum value.

Do high and low pass filters have the same cutoff frequency?

The key difference between high pass and low pass filter is that the high pass filter circuit passes signals of the frequency higher than the cut off frequency while the low pass filter passes signals of the frequency lower than the cut off frequency.