# How to Get PDF of Networks and Systems by D. Roy Choudhury: A Popular Book on Electric Networks and Systems

## Droy Choudhury Networks and Systems PDF Download

If you are an electrical engineering student or a professional who wants to learn more about electric networks and systems, you might have heard of the book Networks and Systems by D. Roy Choudhury. This book is one of the most comprehensive and authoritative texts on the subject, covering topics such as network theorems, topology, analogous systems, Fourier transforms, Laplace transform, two-port networks, filters, synthesis, state variable analysis, feedback system, frequency response plots, and more. It also includes a large number of solved problems, objective type questions, computer applications, and appendices for better understanding and practice.

## droychoudhurynetworksandsystemspdfdownload

But how can you get access to this book in a convenient and affordable way? The answer is simple: you can download the PDF version of the book from various online sources. In this article, we will tell you more about the book, its contents, its features, and how you can download it for free or at a low cost. Read on to find out more.

## Introduction

### What is Networks and Systems by D. Roy Choudhury?

Networks and Systems by D. Roy Choudhury is a textbook that serves as a foundation for the treatment of topics in the field of electric networks and systems for undergraduate students. It was first published in 1988 by New Age International Publishers, and has since been revised and updated several times. The latest edition has 924 pages and 13 chapters.

The book covers both basic and advanced concepts in a clear and logical manner, with an emphasis on problem-solving techniques. It employs Laplace transform solution of differential equations, matrix methods, state variable formulation of network problems, computer programs for various problems, and graphical methods such as Bode plots and Nyquist plots. It also contains material on two-port networks, conventional filters, passive synthesis, feedback system, frequency response plots, etc., which are not usually found in other books on the subject.

### Why is it a popular book for electrical engineering students?

Networks and Systems by D. Roy Choudhury is a popular book for electrical engineering students because it offers several benefits:

It covers both theory and practice in a comprehensive way.

It explains concepts with examples and illustrations.

It provides a large number of solved problems for better understanding.

It includes objective type questions and solutions to selected problems in the appendix.

It gives computer applications for various problems using MATLAB or C++.

It follows a systematic approach from basic to advanced topics.

It is suitable for self-study as well as classroom teaching.

### How can you download the PDF version of the book?

If you want to download the PDF version of the book, you have several options:

You can visit the official website of New Age International Publishers and buy the e-book for Rs. 375 (about $5) .

You can search for free PDF downloads on various websites such as Scribd , EPDFX , or IDOC . However, these websites may not have the latest edition or the complete book, and they may also have some legal or ethical issues.

You can use a PDF converter tool to convert the Google Books preview of the book into a PDF file. However, this method may not give you the best quality or the full content of the book.

Whichever option you choose, make sure you have a reliable internet connection and a compatible device to read the PDF file. You may also need a PDF reader software such as Adobe Acrobat Reader or Foxit Reader to open and view the file.

## Main Content

### Basic Circuit Elements and Waveforms

The first chapter of the book introduces the basic circuit elements such as resistors, capacitors, inductors, voltage sources, and current sources, and their properties and characteristics. It also explains the concepts of voltage, current, power, energy, Kirchhoff's laws, Ohm's law, and Thevenin's theorem. It then discusses the different types of waveforms such as sinusoidal, triangular, square, sawtooth, etc., and their parameters such as amplitude, frequency, phase angle, period, etc. It also shows how to analyze circuits with different types of waveforms using phasors and complex numbers.

#### Mesh and Node Analysis

The second chapter of the book deals with the methods of mesh and node analysis for solving circuits with multiple sources and branches. It explains how to apply Kirchhoff's voltage law (KVL) and Kirchhoff's current law (KCL) to write equations for each mesh or node in a circuit. It also shows how to use matrix methods such as Cramer's rule or Gaussian elimination to solve these equations. It also gives examples of applying mesh and node analysis to circuits with dependent sources and supermeshes or supernodes.

#### Graph Theory and Network Equation

The third chapter of the book introduces the concepts of graph theory and network equation for analyzing circuits in a more general way. It explains how to represent a circuit as a graph with nodes and branches, and how to define terms such as incidence matrix, cutset matrix, loop matrix, tree, cotree, etc. It also shows how to write network equations using these matrices and how to solve them using determinants or inverses. It also gives examples of applying graph theory and network equation to circuits with mutual inductance and coupled circuits.

#### Network Theorems

The fourth chapter of the book covers various network theorems that are useful for simplifying or modifying circuits for easier analysis. It explains how to apply Thevenin's theorem, Norton's theorem, maximum power transfer theorem, reciprocity theorem, substitution theorem, superposition theorem, Millman's theorem, Tellegen's theorem, etc., to different types of circuits. It also gives examples of applying these theorems to circuits with dependent sources and controlled sources.

### Fourier Series and Laplace Transform

The fifth chapter of the book introduces the concepts of Fourier series and Laplace transform for analyzing circuits with periodic or transient signals. It explains how to represent any periodic signal as a sum of sinusoidal components using Fourier series, and how to find the coefficients of these components using integration or trigonometric identities. It also shows how to use Fourier series for finding power and energy in periodic signals. It then explains how to transform any signal from time domain to frequency domain using Laplace transform, and how to find the inverse Laplace transform using partial fraction expansion or residue method. It also shows how to use Laplace transform for finding impulse response, transfer function, convolution integral, etc., in circuits.

#### Application of Laplace Transform

#### Analogous System

The seventh chapter of the book discusses the concept of analogous system for comparing different physical systems that have similar mathematical models. It explains how to find the electrical analogs of mechanical, thermal, fluid, and magnetic systems using force-voltage analogy or force-current analogy. It also shows how to use analogous system for finding the transfer function, frequency response, and stability of different systems. It also gives examples of applying analogous system for analyzing mass-spring-damper system, heat transfer system, hydraulic system, etc.

#### Two-Port Network

The eighth chapter of the book covers the concept of two-port network for analyzing complex networks that have two pairs of terminals. It explains how to define and find different parameters of a two-port network such as z-parameters, y-parameters, h-parameters, g-parameters, ABCD-parameters, etc. It also shows how to use these parameters for finding input impedance, output impedance, voltage gain, current gain, power gain, etc., of a two-port network. It also gives examples of applying two-port network for analyzing transistor amplifier, transformer, attenuator, etc.

### Filters and Synthesis

#### Attenuators

The ninth chapter of the book introduces the concept of attenuators for reducing the power or voltage level of a signal without distorting its shape or frequency. It explains how to design different types of attenuators such as T-attenuator, pi-attenuator, bridged-T attenuator, L-pad attenuator, etc., using resistors. It also shows how to find the attenuation constant, insertion loss, reflection coefficient, VSWR, etc., of an attenuator. It also gives examples of applying attenuators for matching impedances and improving signal quality.

#### Conventional Filters

The tenth chapter of the book deals with the concept of conventional filters for passing or rejecting certain frequency components of a signal. It explains how to design different types of filters such as low-pass filter, high-pass filter, band-pass filter, band-reject filter, all-pass filter, etc., using passive components such as resistors, capacitors, and inductors. It also shows how to find the cut-off frequency, bandwidth, quality factor, phase shift, etc., of a filter. It also gives examples of applying conventional filters for noise reduction and signal processing.

#### Passive Network Synthesis

The eleventh chapter of the book covers the concept of passive network synthesis for creating a network that has a desired input-output relationship. It explains how to use different methods of passive network synthesis such as Foster's method, Cauer's method, Brune's method, Bott-Duffin method, etc., for synthesizing networks with given driving-point impedance or admittance functions. It also shows how to use these methods for synthesizing networks with given transfer functions or frequency responses. It also gives examples of applying passive network synthesis for creating filters and equalizers.

### State Variable Analysis and Feedback System

#### Convolution Integral

The twelfth chapter of the book introduces the concept of convolution integral for finding the output response of a linear time-invariant (LTI) system to any input signal. It explains how to use convolution integral for finding the impulse response and step response of an LTI system. It also shows how to use convolution integral for finding the output response of an LTI system to periodic signals using Fourier series. It also gives examples of applying convolution integral for analyzing RC circuits and RLC circuits.

#### Network Functions

of applying network functions for analyzing feedback amplifiers and oscillators.

#### Feedback System

The fourteenth chapter of the book covers the concept of feedback system for modifying the performance of a system by feeding back some portion of the output to the input. It explains how to classify different types of feedback systems such as positive feedback and negative feedback, series feedback and parallel feedback, voltage feedback and current feedback, etc. It also shows how to analyze the effects of feedback on input impedance, output impedance, gain, bandwidth, stability, distortion, etc., of a system. It also gives examples of applying feedback system for designing voltage regulators and op-amp circuits.

#### Frequency Response Plots

The fifteenth chapter of the book introduces the concept of frequency response plots for visualizing the behavior of a system as a function of frequency. It explains how to use different types of frequency response plots such as Bode plot, Nyquist plot, Nichols plot, etc., for representing the magnitude and phase response of a system. It also shows how to use these plots for finding the gain margin, phase margin, stability criterion, resonance frequency, bandwidth, etc., of a system. It also gives examples of applying frequency response plots for analyzing filters and feedback systems.

## Conclusion

### Summary of the main points

In this article, we have discussed the following main points:

Networks and Systems by D. Roy Choudhury is a comprehensive and authoritative textbook on electric networks and systems for undergraduate students.

The book covers both basic and advanced topics in a clear and logical manner, with an emphasis on problem-solving techniques.

The book provides a large number of solved problems, objective type questions, computer applications, and appendices for better understanding and practice.

The book can be downloaded in PDF format from various online sources for free or at a low cost.

### Benefits of reading the book

By reading this book, you can gain several benefits such as:

You can learn the fundamental concepts and principles of electric networks and systems in a systematic way.

You can enhance your analytical and computational skills by solving various problems and exercises.

You can prepare yourself for higher studies or professional exams in electrical engineering.

You can apply the knowledge and techniques learned from this book to real-world problems and projects in electrical engineering.

### Call to action

If you are interested in reading this book, you can follow these steps:

Visit the official website of New Age International Publishers and buy the e-book for Rs. 375 (about $5) , or search for free PDF downloads on various websites such as Scribd , EPDFX , or IDOC .

Download the PDF file to your device and open it with a PDF reader software such as Adobe Acrobat Reader or Foxit Reader.

Read the book at your own pace and enjoy learning about electric networks and systems.

Don't miss this opportunity to get access to one of the best books on electric networks and systems. Download Networks and Systems by D. Roy Choudhury today and start learning!

## Frequently Asked Questions

Here are some frequently asked questions about Networks and Systems by D. Roy Choudhury:

Who is D. Roy Choudhury?

D. Roy Choudhury is a professor of electrical engineering at Delhi College of Engineering (now Delhi Technological University), India. He has more than 40 years of teaching experience and has authored several books on electrical engineering such as Linear Integrated Circuits, Modern Control Engineering, Signals and Systems, etc.

What are the prerequisites for reading this book?

This book is suitable for undergraduate students who have completed courses on basic circuit analysis, differential equations, linear algebra, complex variables, etc. It is also helpful if you have some familiarity with MATLAB or C++ programming languages.

How long does it take to read this book?

This book has 924 pages and 13 chapters. The time it takes to read this book depends on your reading speed, comprehension level, and interest in the subject. However, a rough estimate is that it may take you about 40 to 50 hours to read this book thoroughly.

Is this book available in other formats or languages?

This book is available in hardcover and paperback formats, as well as in e-book format. It is also available in Hindi language.

Where can I find more resources or references on this topic?

If you want to learn more about electric networks and systems, you can refer to other books such as Electric Circuits by J. W. Nilsson and S. A. Riedel, Fundamentals of Electric Circuits by C. K. Alexander and M. N. O. Sadiku, Network Analysis by M. E. Van Valkenburg, etc. You can also find online courses, videos, lectures, tutorials, etc., on websites such as Coursera, edX, Khan Academy, YouTube, etc.

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