Free Book about Op-Amp Applications, from Texas Instruments

I was looking for a solid reference resource, this evening, as with regards to design of frequency-domain active filters in audio and signaling applications. I found the following the eBook. It seemed that it would be fit to share a note about, here at my DSP42 web log. Published by Texas Instruments in 2002, the eBook is titled, Op-Amps for Everyone.

Across all of 464 pages of PDF format text, the eBook provides a comprehensive introduction to op-amps -- now available in free, PDF eBook format. The eBook is published by Texas Instruments, but provides a vendor-agnostic, essentially non-proprietary view with regards to op-amp applications.

This eBook provides introductions to concepts and applications of op-amps, with corresponding mathematical formulas throughout. As a small sampling of the topics addressed in the eBook:

• Chapter 3 of the eBook addresses op-amp applications in a generic sense, focusing on methods for applications of op-amps within common kinds of amplifier circuit, including: Inverting amplifiers; non-inverting amplifiers; differential amplifiers; video amplifiers; etc. 
• Chapter 4 of the eBook provides a contrast between single-supply and dual-supply applications of op-amps. Chapter 15 of the eBook is dedicated to oscillator designs, for generating sinusoidal waveforms. 
• Chapter 16 of the eBook is dedicated to discussions of active filter designs. 

The eBook addresses a number of concepts that might be addressed, in parallel, in the course material of the DeVry University Online ECT-246 course. The eBook also provides some information about some additional concepts, such that may be encountered -- broadly -- within a context of design and analysis of op-amp circuits.

To the aspiring software programmer, perhaps the eBook may serve to provide a convenient, singular reference model for design of an electronic design automation (EDA) tool for amplifier design and analysis in frequency-domain applications.

Relevance of electrical impedance?

How is electrical impedance relevant in real world applications...?

Rawk music! Seriously, though - there's an analysis of the commonality of high and low impedance signals in audio systems, including band systems -- along with a broad review of electrical systems theory -- from Whirlwind Music Distributors, Inc. 

Of course, remembering that a digital circuit's data sheet may denote an "Unkonwn" quality for a digital logical element, in a situation of "high impedance", certainly electromagnetic impedance would be a relevant quality in digital circuits, too? (Candidly, it might be difficult to find any sort of research about the same, but I'll check  Google Scholar , too.)

So, after checking the research more, it looks like there are applications for analysis of impedance, in industrial power systems, viz a viz:

• Art & Science of Protective Relaying, a textbook published by GE Digital Energy (official)
• Sachdev, M.S.  A New Algorithm for Digital Impedance Relays via the IEEE Xplore digital library
• Smolinkski, W.J.  An Algorithm for Digital Impedance Calculation Using a Single PI Section Transmission Line Model, likewise via IEEE Xplore

So, I suppose that's towards applications in industrial electronics. Perhaps it's simply a quixotic idea, to wonder if there's a relevance of impedance in digital microcircuits?

Certainly towards an application in digital measurement technology, thence perhaps applicable towards semiconductor design: Smyrl, William H.  Digital Impedance for Faradaic Analysis published by the Journal of the Electrochemical Society, no doubt a peer-reviewed journal. Perhaps the article is more in reference to Dielectric Spectroscopy , however --something certainly about microscopic qualities within electrical circuits -- perhaps less immediately relevant, if with regards to immediate calculation of electrical impedance within an analog circuit.

Other than the textbook from GE Digital Energy, those formal articles are all limited-access, however -- requiring a subscription of some kind, if not a per-article fee -- to simply read about the existing academic research, at least at those web resource pages. Perhaps a pre-print PDF edition might be available of any of those articles, however, via a simple, quoted "Google Search" -- if not a similar search, via Google Scholar -- of any of those article's "Title" texts? "YMMV" I'm sure.

Reading the Wikipedia article about Dielectric Spectroscopy, however, I think that that article seems to go well into a depth of explanation, perhaps serving to explain what's some of the science underlying the impedance calculations, in these matters of circuit analysis