Question: I need the filter to be tunable, so can i use and external clock with tunable frequency? Can I also change the external resistor with a potentiometer to adjust the R value in order to have a maximally flat response?
Answer: You may use a variable external clock with tuneable frequency to make the filter tuneable.
You can also change the external resistor with a potentiometer to adjust the R value in order to have a maximally flat response.