8.2.1. Filtering

Try these first

1. 1.

   What is the function of a low-pass filter?

   Hint

   Think about what frequencies it lets through.

2. 2.

   Name one type of digital filter.

   Hint

   It has a finite number of input samples.

3. 3.

   What type of filter allows high frequencies to pass and attenuates low frequencies?

   • Low-pass filter
   • Band-pass filter
   • High-pass filter

   Hint

   Think about what it means to 'let through' high frequencies.

4. 4.

   True or False: FIR filters can utilize feedback.

   • True
   • False

   Hint

   Consider the 'finite' aspect of FIR.

5. 5.

   Design a band-pass filter that allows frequencies between 500 Hz and 1500 Hz to pass through. What components would you need?

   Hint

   Consider how you'd set the upper and lower frequency limits.

6. 6.

   Explain the advantages and disadvantages of FIR and IIR filters in a signal processing application.

   Hint

   Think about resource allocation versus stability in processing.