**Network/Circuit Analysis**

Electronics means Circuit and analyzing a circuit is nothing but Circuit analysis. This is the most important subject in the field of Electrical/Electronics engineering. A student who doesn’t have a grip on this subject will not get good marks in any competitive exam. Even if few questions related to network analysis appear in GATE, understanding the network analysis is must and should for anyone who calls themselves as a Electrical/Electronics Engineer. Without network analysis, one cannot study Analog Electronics, BJT’s , MOSFET, VLSI and Analog Communication.

Important topics

*Part 1 : Basics*

- Understanding of KCL and KVL
- Mesh and nodal analysis
- Understanding of Voltage source and Current source
- Thorough understanding of Thevenin’s theorem and various scenarios/techniques
- Norton’s theorem
- Maximum Power transform theorem(What is it and what’s the use ) . Will be helpful while studying Transmission lines

* Part 2 :*

- Understanding of Transient analysis and Steady state analysis
- What is Time constant
- Transient response of RC, RL and RLC circuits.
- Problems related to this concept
- Behaviour of Inductor and Capacitor
- Understand the role of Capacitor and Inductor(Voltage source and current source)
- Numericals
- Solve a circuit problem using Laplace transform
- AC power analysis

Tip: Most competitive exams test your understanding of Equivalent resistance. Some of the common questions will be as listed below. Students aiming for top rank should know how to tackle these problems.

- Resistor ladder
- Resistor Cube
- Op-Amp with resistor etc
- Wheatstone bridge

**Book Suggestion **

Network Analysis by Van Valkenburg

**Control Systems**

There will be lot of 1 marks and 2 marks questions related to Control Systems in GATE ECE paper. Most of the questions will be easy. A student aspiring to crack GATE ECE should know following topics in Control Systems. Understand the subject and revise once before the exam.

- Block diagram manipulation
- Signal flow graphs and Mason’s gain formula
- Types of Feedback
- Concept of stability and thorough understanding of Routh Stability criterion
- Effects of Zeros and Poles
- Steady state error constants for different TYPES of system(Type 0,1,2)
- First order, second order systems
- How to draw Root locus diagram and Bode plot
- How to calculate gain margin and phase margin
- Lead – Lag Compensators,
- Different types of Compensators and their applications

Recommended Book for Control systems especially those who are aiming for GATE/IES is

Control Systems by Nagrath and Gopal

**Transmission Lines and Electromagnetic Waves**

Questions based on Transmission Lines, Maxwell equations, Waveguides(TE, TM and TEM) and Plane waves are commonly asked in GATE – ECE examination. A student who puts extra effort in studying these subjects will excel in GATE-EC 2017 with flying colors.

Recommended Book for Transmission Lines and Electromagnetics is Electromagnetic Waves by R. Shevgaonkar . Here are the contents of the book.

Chapter 1 Introduction

Chapter 2 Transmission Lines

Chapter 3 Maxwell’s Equations

Chapter 4 Uniform Plane Wave

Chapter 5 Plane Waves at Media interface

Chapter 6 Waveguides

Chapter 7 Dielectric Waveguide

Chapter 8 Radiation

Chapter 9 Antenna Arrays

Chapter 10 Propagation of Radio Waves

Chapter 11 Applications of EM Waves

**Analog Electronics**

Analog Electronics is the important topic in the GATE ECE paper. Most of the questions will be on BJT, MOSFET, Amplifier gain etc. Some of the important topics from Analog Electronics are

- Semiconductor theory
- Diodes
- Different types of diodes ( Zener , Tunnel , Schottky diode, Photo diode, LED ..)
- Diode Applications ( Clipper/ Clamper circuits, Rectifier( Half wave/Full wave ..)
- BJT theory
- MOSFET in detail (MOS capacitor theory, Structure, operation, VI characteristics)
- Difference between enhancement type MOSFET and depletion type MOSFET
- small signal model
- Frequency response of amplifiers
- Large signal amplifiers (Class A/B/AB/C ..)
- Feedback amplifiers
- Operational amplifers

Most recommended book for Analog electronics is Microelectronics by Sedra & Smith