Customer Reviews

Analog Filter Design (Oxford Series in Electrical and Computer Engineering)

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(Reviewed by a practicing electrical engineer)

This book is an excellent introductory text about
analog filter design. It was written for use in
teaching a junior-senior level undergraduate class
at the University level.

The book begins with a review of basic op amp circuits
and then progresses to simple one-pole circuit
designs. From there, the author builds a step-by-step
theoretical background for active filter design,
starting with the most fundamental two-pole building
block (the biquad circuit), and then showing how to
use these to design Chebyshev, Butterworth, and Bessel
filter characteristics of any number of poles.
Cauer, Inverse Chebyshev, and switched capacitor
designs are also covered.

Other highly useful chapters cover delay equalization,
sensitivity to component variations, as well as a
general design approach for choosing appropriate
filter characteristics for a design requirement.

The book's main focus is on active filter design using
op amp's, although there is also one chapter devoted
to passive filter design. Design is stressed in the
examples and problems from the very beginning pages,
as opposed to mere mathematical analysis.

The mathematics are fairly straightforward, mostly
algebra, and the text is fairly easy to read and follow.
Examples illustrate each chapter segment, and each
chapter has questions at the end.

I would recommend this book for anyone seeking a
basic theoretical understanding and design capability
for active filters. (Probably other introductory
texts would be better for passive filters.) This is
not a "handbook" or "filter cookbook"; it actually
lays the theoretical and mathematical groundwork for
the filters it teaches you to design.

It is assumed that the reader of this book has had a first course in circuit analysis and is familiar with Laplace transforms. Because the book is intended for undergraduates, algebra is used to explain the mathematical workings of the various filters rather than calculus if at all possible. The book concentrates on inductorless filters. Such filters are required for voice and data communications systems where the size and weight of inductors make their use not very feasible. An advantage of this approach is that the usefulness of the op amp can be stressed. Chapter 2 introduces the op amp in analog operations: addition, subtraction, multiplication, and integration. Chapters 3 and 4 constitute a review of sinusoidal steady-state topics recast to provide an introduction to first-order filters. Chapter five features the universal biquad, and through it the standard forms of filter response: lowpass, bandpass, highpass, bandstop, and allpass.

In the chapters that follow, the functions of a filter are studied in combination with the frequency-response approximation used by filter designers: Butterworth, Chebyshev, Bessel-Thompson, inverse Chebyshev, and elliptic. Chapter 14 treats the synthesis of doubly terminated passive ladders. This, together with Chapter 11, constitute an introduction to passive filter design. An important conclusion is reached in Chapter 14 in regards to sensitivity - the passive ladder circuit has low sensitivity. The study of simulated ladder circuits is begun in chapters 15 through 17. Simulation of the passive ladder is accomplished in three ways: by introducing new elements which make it possible to exclude the inductor, through the simulation of the block diagram representation of the ladder, and through the simulation of resistors using switched capacitors. All of these methods are discussed.

In spite of its academic origins this really is a very helpful design book. It has the circuits side by side with the math, and it also has design rules in numbered steps with very good illustrations and examples throughout. I highly recommend it for the library of the practicing engineer as well as the student.

I took this class eons ago, and it was as good as Hodges and Jacksons transistor design theory (which is btw a classic and used to this day in the fast paced design world). The book starts the student from stractch and presents filtering design in a practical fashion builing the knowledge up from the fundamentals. I can't think of any other book that I could recommend as an introductury text book.

Analog Filter Design (Oxford Series in Electrical and Computer Engineering)(Reviewed for a practicing electrical engineer) Instead of rewriting what has been excellently stated please refer to the review provided by "A Customer" titled & dated: "An excellent introductory text about analog filter design., July 30, 1996" provided by: "A Customer".

Please note that this book does have errors in it. This just means one must pay close attention in class and annotate the book appropriately. I have been using this book to successfully design analog filters in large-scale projects with extremely fine tolerances at a major aerospace company for 24+ years and it has served me well. So well, in fact so well that it was permenently borrowed from my office. This prompted me to purchase another copy even knowing that there is a newer edition and that this book has the abovementioned errors.

BTW: I did buy the newer version of this book and found that while that is an outstanding book in its own right, it is not "this" book.