Simplified Design of Filter Circuits (EDN Series for Design Engineers)

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Product Description

Simplified Design of Filter Circuits, the eighth book in this popular series, is a step-by-step guide to designing filters using off-the-shelf ICs. The book starts with the basic operating principles of filters and common applications, then moves on to describe how to design circuits by using and modifying chips available on the market today. Lenk's emphasis is on practical, simplified approaches to solving design problems.



Contains practical designs using off-the-shelf ICs
Straightforward, no-nonsense approach
Highly illustrated with manufacturer's data sheets

Simplified Design of Filter Circuits (EDN Series for Design Engineers) Review

This 1999 book covers many active filter circuits, often using examples from manufacturers' publications - that is good in that it provides tested, real-world examples, but a few circuits are tied to specific ICs that are not now as common as they once were. The obvious book to compare this to is Don Lancaster's (older) "Active Filter Cookbook"... which is certainly more useful for the typical filter applications and covers many of the practical hints and tips real-world designers need. But Lenk's book includes quite a few developments (such as switched-capacitor filters, current-feedback amplifiers, Phase-Locked Loops, and newer wideband Transconductance amplifiers than the CA3080 mentioned in Don Lancaster's book). Examples of high-order filters go a little beyond the Lancaster book too, but to increase the breadth (in a book of roughly the same size) the depth is not as great... in fact the (admittedly very neat) 25 page Introduction to Electronics Filters that is Chapter 1 - borrowing a lot from National Semiconductors 1994 "Linear Applications Handbook" - covers pretty much what Don Lancaster's book takes 9 chapters and almost 200 pages to cover - and 200 pages is about right... condensing into 25 pages means too much is lost.

The organisation of the book is reasonably good... much better than those that simply shovel in material from manufacturer's datasheets and other publications. Yet I struggle to agree with the "Simplified Design" part of the title... the first chapter lacks enough information to design filters, simply or not, while other chapters present filter circuits from manufacturers that either have no clear way to design them according to requirements such as frequency and bandwidth, or require the use of tables with little explanation (and far less simple than scaling sample circuits in the Lancaster book). Ultimately, I feel this is a book to fill in some of the gaps you may (rarely) have if you purchase Lancaster's "Active Filter Cookbook", which remains my first choice in this field.

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