Does LPF limit the maximum sampling frequency of the input signal? [closed]

1. What is the function of LPF in sampling?
2. What is sampling frequency in low-pass filter?
3. What is the maximum sampling frequency?
4. What happens when the sampling frequency is too low?

What is the function of LPF in sampling?

A low-pass filter is a filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency. The exact frequency response of the filter depends on the filter design.

What is sampling frequency in low-pass filter?

Operating at a sampling rate of 1 MS/s, the Nyquist frequency is 500 kHz. The output of the 100 kHz low-pass filter has to have a stop band attenuation to bring signal components above Nyquist down to the ADC noise floor—in this case greater than -73 dB for frequencies greater than 500 kHz.

What is the maximum sampling frequency?

Theoretically the maximum frequency that can be represented is half the sample rate (known as the Nyquist frequency). In practice, the limit is a little lower, so the practical upper frequency limit for a sample rate of 44,100 Hz, is a little over 20,000 Hz, but less than 22,050 Hz.

What happens when the sampling frequency is too low?

As the sampling frequency decreases, the signal separation also decreases. When the sampling frequency drops below the Nyquist rate, the frequencies will crossover and cause aliasing.