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Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.

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Presentation on theme: "Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters."— Presentation transcript:

1 Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters Signal-to-noise ratio Error-correcting codes Aiming toward the Filter Quiz…

2 Reading: Handout on active filters, selected pages from Chpt 5 of Horowitz & Hill, The Art of Electronics (2nd Ed), Cambridge Univ Press (1989) Book itself on the 095 bookshelf…

3 The bandpass filter diagram is not complete: A unity gain voltage follower (UGVF) op amp is needed between the LP and HP filters to isolate the components in LP filter from interacting with components in the HP filter.

4 Low pass, high pass, active filters Ref mysite.mweb.co.za

5

6

7 VCVS filter modes Butterworth (maximally flat) Chebyshev (maximally sharp) Bessel (best linear phase)

8 Diagram of a FIR digital filter www.ami.ac.uk

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