## Description

The Analog Circuit Design Series set reduces the concepts of analog electronics to their simplest, most obvious form which can easily be applied (even quantitatively) with minimal effort. The emphasis of the set is to help you intuitively learn through inspection how circuits work and apply the same techniques to circuits of the same class.

This first volume,*Designing Amplifier Circuits,* presents the basic principles of transistor circuit analysis, basic per-stage building blocks, and feedback. The content is restricted to quasi-static (low-frequency) considerations, to emphasize basic topological principles. The reader will be able to analyze and design multi-stage amplifiers with feedback, including calculation and specification of gain, input and output resistances, including the effects of transistor output resistance.

Of note is the presentation of feedback analysis, a subject rarely covered by other books, with insights and from angles that will reduce to analysis by inspection for readers. Some circuit transformations outlined within are especially helpful in reducing circuits to simpler forms for analysis. They are usefully applied in considering transistor circuits for which collector-emitter (or drain-source) resistance is not negligible, another often omitted topic which this book details.

## Book contents

**Chapter 1 Electronic Design**

Electronic Design

Product Development

Design-Driven Analysis

Nonlinear Circuit Analysis**Chapter 2 Amplifier Circuits**

Bipolar Junction Transistor T Model

The ß Transform

Two-Port Networks

Amplifier Configurations

The Transresistance Method

Input and Output Resistances

The Cascade Amplifier

BJT Output Resistance

The Cascode Amplifier

The Effect of Base-Emitter Shunt Resistance

The Darlington Amplifier

The Differential (Emitter-Coupled) Amplifier

Current Mirrors

Matched Transistor Buffers and Complementary Combinations

Closure**Chapter 3 Amplifier Concepts**

The Reduction Theorem

µ Transform of BJT and FET T Models

Common-Gate Amplifier with r_{o}

Common-Source Amplifier with r_{o}

Common-Drain Amplifier with r_{o}

FET Cascode Amplifier with r_{o}

Common-Base Amplifier with r_{o}

CC and CE Amplifiers with r_{o}

Loaded Dividers, Source Shifting and the Substitution Theorem

Closure**Chapter 4 Feedback Amplifiers**

Feedback Circuits Block Diagram

Port Resistances with Dependent Sources

General Feedback Circuit

Input Network Summing

Choosing xE, xf, and the Input Network Topology

Two-Port Equivalent Circuits

Two-Port Loading Theorem

Feedback Analysis Procedure

Noninverting Op-Amp

Inverting Op-Amp

Inverting BJT Amplifier Examples

Noninverting Feedback Amplifier Examples

A Noninverting Feedback Amplifier with Output Block

FET Buffer Amplifier

Feedback Effects on Input and Output Resistance

Miller’s Theorem

Noise Rejection by Feedback

Reduction of Nonlinearity with Feedback

Closure**Chapter 5 Multiple-Path Feedback Amplifiers**

Multipath Feedback Circuits

Common-Base Amplifier Feedback Analysis

Common-Emitter Amplifier Feedback Analysis

Common-Collector Amplifier Feedback Analysis

Inverting Op-Amp with Output Resistance

Feedback Analysis of the Shunt-Feedback Amplifier

Shunt-Feedback Amplifier Substitution Theorem Analysis

Idealized Shunt-Feedback Amplifier

Cascode and Differential Shunt-Feedback Amplifiers

Blackman’s Resistance Formula

The Asymptotic Gain Method

Emitter-Coupled Feedback Amplifier

Emitter-Coupled Feedback Amplifier Example

Audiotape Playback Amplifier Examples

Closure

References

## About the author

Dennis Feucht is the owner of Innovatia Laboratories (Cayo, Belize), a firm that specializes in motion control, power electronics, microcomputer-based instrumentation, electromechanics and automation. Feucht is an electronics engineer with extensive experience doing leading-edge electronics design of high-performance test instruments, robotics, and motion control systems for over 30 years. He is editor of the American Scientific Affiliation Newsletter.