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BIOEN 316
Biomedical Signals and Sensors
Spring 2017

Recommended reading

List updated 5/20/17, 12:10 p.m.

For May 22, 2017:

• IIR filters: Semmlow, section 8.5.
• Sections 4.1.3 and 4.1.4 deal with data truncation and basics of windowing... and yes, there are Hamming and Hanning and Hann windows, which are all slightly different.
• Section 7.3, list items 2 and 3 (frequency domain and convolution approaches). The "transfer function" is what we multiply in the frequency domain, so for an idea filter it would be the sequence of ones and zeros that makes up the pass and stop bands.
• Example 7.5: optional, since we have already covered Bode plots.
• All of section 8.1, plus section 8.2.1, is relevant to our study of filters. Note that the textbook uses the approach of making the ideal filter spectrum in frequency (not just low-pass) and doing the IFFT of that, without the multiplication by a cosine. That works, but it does not teach us as much about convolution and time/frequency transitions.
• In case you have Understanding Digital Signal Processing by Lyons: chapter 5 has the best description of the window design method that we have been using in class to make LP, BP, and HP filters. Section 3.9 compares the common windows, and figure 3.16 has a great comparison of their magnitude spectra; the size of those side lobes at various frequencies is the basis for choosing one window type over another.
• If you are searching with Google, use the search phrase "window design method". The first few slides of this talk are decent: signal.ece.utexas.edu/~arslan/courses/dsp/lecture17.ppt

For May 8-10, 2017: Instrumentation and operational amplifier circuits

• Please read text sections 12.0 and 12.1, and as much of this tutorial on instrumentation amplifiers from Analog Devices as you can productively. When you find that the tutorial is becoming more confusing than helpful, stop!
• The following sections are for reference and not required reading.
• Section 11.1 covers parallel and series impedances.
• Chapter 12 covers op-amps. and 12.2 cover the basics, and I also recommend 12.6 on the power supplies.
• The inverting amplifier is in section 12.4, and the buffer or voltage follower is in 12.7.3.
• The first-order low-pass filter is section 12.7.5.
• Section 12.7.6 shows how you can build an instrumentation amplifier out of op-amps. You will not be required to do this, but you will need to know the Common Mode Rejection Ratio, from (page 555).

For April 28, 2017 (Convolution):

• Semmlow, sections 7.1 and 7.2; 7.2.1 and onward is optional.

For April 19, 2017 (RC, RLC):

• Text sect 5.4 includes many Bode plots, and sect 5.5 shows a multi-part analysis example.
• Section 11.5.1 covers measurement loading, which is related to the need for the voltage following in the cascaded 1st-order filters.

For April 17, 2017 (RL, RC):

• Semmlow, sections 9.3 and 9.4.

For April 10, 2017 (Aliasing):

• Semmlow, sections 4.1.1, 4.1.2, and 4.1.3.
• These documents from Texas Instruments provide a more detailed discussion of A-to-D conversion: PRINCIPLES OF DATA ACQUISITION AND CONVERSION and A Glossary of Analog-to-Digital Specifications and Performance Characteristics. Both articles are pretty long and are optional.

For April 3-5, 2017 (Fourier Series & Transforms):

• Semmlow, sections 3.2 - 3.6.

For March 29, 2017:

• Semmlow, section 1.2, especially section 1.2.3 through "several DAC channels" on p. 12; the part that follows is less relevant at this point.
• Sect 1.4.1, relevant to statistics, and MATLAB example (for BIOEN 317 lab).

For March 31, 2017:

• Before class: Semmlow, section 2.1. Most of it will be review from high school.
• After class: Semmlow, appendix A.1; Appendix A.2 is optional (at least it is good to know that the derivation is there in case you are interested).

The sections below refer to 2016 readings and will be moved into 2017 as needed.

For April 20 (filters):

• Semmlow, section 8.1.1.
  

For quiz and final exam questions on sensors: The following topics and sections refer to Medical Instrumentation, Application and Design, by John Webster.

For May 19, More op-amp circuits

• Non-inverting amp (12.3) and second-order filters (figure 12.34 and problems 12.13 & 12.14).
• Texas Instruments provides an analysis of the Sallen-Key circuit, which I really like except that they do not use subscripts, resulting in terms like Z2Z2Z4. Section 3 introduces low-pass filters and section 3.4 covers the version we saw in class, with all the Rs equal and the Cs equal.

Extras

• Instructions for making a pulse oximeter using TI''s inexpensive Launch Pad microprocessor.
• Prutchi and Norris book on line via UW library.

For later, as needed:

• Problem 1.6 is an example of quantization error.
• Problem 1.11 gives an example with decibels.

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