资 源 简 介
Analog design is all about insight. More designs lead to better insight, whichis built on experience. There is no shortcut to more experience than to carry outmore designs. And yet, analog design automaTIon has been promised to buildup insight faster and more efficiently. For this purpose, analog design must firstbe structured. This is what this book is all about.Terms such as structured design, algorithmic design, systemaTIc design, etc.all refer to a better descripTIon of the design procedures used. They are key tothe documentaTIon of an analog circuit. They are key to the redesign of analogcircuits. As a result structured design has become a necessity to efficient analogdesign. Structured design has become a necessity to provide optimal circuits,subject to a set of specifications.This book explains how to structure the design process such that optimalcircuits result. It is divided in a number of chapters which detail the designprocedures. Each chapter contains a number of examples. It is aimed at amplifiersfirst, covering all aspects such feedback, frequency compensation, noiseand distortion. Finally considerable attention is paid to biasing circuits. Thestructured design approach is mainly illustrated by means of amplifier designs.No sampling circuits nor converters are considered. On the other hand bothCMOS and Bipolar transistors are used in parallel.The first chapters introduce the fundamentals of structured design, showinghow this can lead to the synthesis of analog integrated circuits. Concepts suchas nullors, norators, conveyers, etc. are introduced and applied to circuits ofhigher complexity. Then feedback is discussed. The four types of feedback aredetailed. It is shown how they naturally evolve from the basic circuit blocks ofthe first chapters.The two main limitations are noise at low signal levels and distortion at highsignal levels. Noise receives considerable attention in this book. All aspectsare discussed in great detail, such as origin, models and ways to accuratelydescribe their influence both in the circuits themselves as towards the inputs.Amplifiers invariably use feedback to improve the accuracy and the bandwidth.Chapters on frequency compensation are thus inevitable. Terms suchas pole splitting, pole-zero compensation, phantom zero, etc. are treated withgreat care and precision. This by itself is sufficient a reason to check this bookout.Finally a large chapter is devoted to biasing. Most books on analog circuitsomit these circuits as they seem to be of less importance. However in analogdesign, biasing circuits are the backbone to set the transistor parameters right.This chapter is thus very welcome. It details many circuit solutions and designexamples.It can be concluded that this book is invaluable to whoever is serious inoptimizing the design cycle. It shows how analog design can be structured,leading to faster design and less errors. As a result this book is key towardsgaining insight in analog circuit design and performance.
