Please provide Handwritten answer.
Please provide Handwritten answer.
Electrical Engineering
It is a common practice to low-pass filter signals before feeding them into an A/D Converter. The purpose of this filter is to eliminate any noise or other frequency components beyond a useful frequency range. For instance, if you are recording ECG, you would low-pass filter it at 100Hz because there is no useful frequency components beyond 100Hz and if there is any component that would be noise. What problem arises during sampling of the signal by the A/D Converter if this pre-filter is not used? How does the sampling frequency need to be adjusted with and without the pre-filter? Answer the question considering Nyquist theorem.
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