Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency...

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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 • Signal-to-noise ratio • Error-correcting codes • Aiming toward the Filter Quiz…

Transcript of Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency...

Page 1: Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.

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…

Page 2: Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.

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…

Page 3: Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.

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.

Page 4: Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.

Low pass, high pass, active filters

Ref mysite.mweb.co.za

Page 5: Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.
Page 6: Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.
Page 7: Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.

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

Page 8: Filter Design Filtering in time (sampling) Filtering by amplitude (window discriminator) Frequency filtering Low Pass, High Pass, Band-pass, Notch filters.

Diagram of a FIR digital filter

www.ami.ac.uk

http://www.ami.ac.uk/

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