- Lecture 6 slides on
*Infinite Impulse Response Filters*is available in PowerPoint format.- Spring 2024 Part 1
- Board. All-pole IIR Biquad Transfer Function
- Board. Deriving an IIR biquad transfer function from a block diagram (after lecture)
**Lecture notes**by TA Alice Liu (Spring 2023)

- Spring 2024 Part 2
- Board. First-order IIR filter frequency response by graphical method
- Demo. Matlab code for IIR filter pole-zero configurations: Left - Middle - Right (slide 6-11)
- Handout "All-pass Filters" (slide 6-11)
- Board. Second-order IIR filters with real-valued poles and zeros
- Demo. Time/frequency/z domain movies
from
*DSP First*, 2nd ed. **Lecture notes**by TA Dan Jacobellis (Spring 2023)

- Spring 2024 Part 3
- Handout. BIBO stability (slides 6-13 and 6-14)
- Board. IIR Biquad Three Possible Regions Of Convergence
- Tuneup. In-Lecture Assignment #2 on IIR Filter Design
- Board. In-Lecture Assignment #2 on IIR Filter Design
**Lecture notes**by TA Alice Liu (Spring 2023)

- Spring 2024 Part 4
- Interactive demo for filtering audio signals
- "Tapped Delay Line on C6700 DSP"

- Spring 2024 Part 1
- Lecture on IIR filters in spring 2014 on Video: Part 1, Part 2, Part 3, Part 4 and Part 5.

- Fall 2023 marker board notes
- Part 1
- Board. First-Order IIR Filter Analysis for pole at z = 1/2 and the general case
- Board. Second-Order IIR Filter Analysis for all-pole case, highpass example and the general case
- Spring 2023
**Lecture notes**by TA Alice Liu

- Part 2
- Board. Review of IIR Filters
- Demo: Time/frequency/z domain movies
from
*DSP First*, 2nd ed. - Demo: Matlab code for IIR filter pole-zero configurations: Left - Middle - Right (slide 6-19)
- Filter Design Rules of Thumb and Loss of Precision due to Unfactoring
- Handouts: "All-pass Filters" (slide 6-11) and BIBO stability (slides 6-24 and 6-25)
- Spring 2023
**Lecture notes**by TA Dan Jacobellis

- Part 3
- Board. Review of frequency response of biquads
- Handout: "Parallel and Cascaded Realizations of IIR Filters"
- Spring 2023
**Lecture notes**by TA Alice Liu

- Interactive demo for filtering audio signals
- "Tapped Delay Line on C6700 DSP"

- Part 1
- Lecture on IIR filters in spring 2014 on Video: Part 1, Part 2, Part 3, Part 4 and Part 5.
- Spring 2023 marker board notes
- Part 1
- Video: The Voder: 1939, the world's first electronic voice synthesizer
- Demo #1: Chromogram - MATLAB code

- Part 2
- Part 3
- Pole-zero placement for a first-order IIR filter
- In-Lecture Assignment #2: filter specifications and implementation as cascade of biquads vs. single section

- Part 1
- Fall 2022 marker board notes
- Part 1
- Part 2
- After class

- Spring 2022 marker board notes
- Part 1: First-order IIR filter: transfer function
- Part 2: Biquads and Filter design by pole-zero placement
- All-pole biquad initial conditions for LTI and transfer function (marker board)
- General biquad transfer function and magnitude response based on pole-zero locations (marker board)
- Matlab code for slide 6-9: Left - Middle - Right
- Handout O "All-pass Filters"
- Slide 6-10
Time/frequency/z domain movies
from
*DSP First*, 2nd ed.

- Part 3: More filter design by pole-zero placement demos, stability, and filter design demos
- Filter design by pole-zero placement demos: first-order and biquad IIR filters (marker board)
- Bounded-Input Bounded-Output (BIBO) Stability handout and marker board notes

- Fall 2021 marker board notes
- Spring 2021 marker board notes
- Part 1: first-order and second-order IIR filters
- Part 2:
- Part 3: (from Spring 2014 due to winter storm cancelling courses)
- BIBO Stability video 3:17 to 19:40, handout, and slides 6-14 and 6-15
- FIR/IIR Filter Design Matlab Demos video 7:59 to 39:29, and slides 6-26 to 6-29

- Fall 2020 marker board notes
- Part 1: IIR transfer functions and frequency responses (slides 6-3, 6-4, 6-6, and 6-8)
- Part 2: Takeaways from part 1
- Part 2: Connecting pole and zero locations to frequency selectivity (slide 6-9)
- Part 2: IIR loss of precision leads to loss of LTI properties (slide 6-12)

Last updated 03/05/24. Send comments to bevans@ece.utexas.edu