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Oct 31, 2014

Analog Circuits : Preparation Strategy for GATE EE

Preparation tips from Ankit Goyal Official Blog (GATE 2014 EE Topper)

Analog circuit has its roots in electronics generally electrical people used to leave this topic. It seems very hard subject. But by learning few topics you can overcome apprehension of this subject. As far as gate is concerned, there is no need of through out knowledge of Electronics Devices.
Electrical engineers can leave Electronic Devices for gate but basic working principles of devices (Diode, BJT, MOSFET, FET) are necessary. You need to know about various terminals and direction of current Flow and applied terminal voltage for different modes of operation. The following topics are included in Analog Circuits:

Diodes Circuits:
It is very important topic for Gate exam. Clipper should be practiced thoroughly. You can practice various Diode circuits from kanodia book and any reference book.Thermal effect on Diode can be left as it is an unimportant topic. Also general circuits where we need to judge the state of multiple diodes in a single circuit is important and should be practiced.

Biasing and Amplifiers:
You should know about biasing concepts like finding the Q-Point or Operating point in a circuit for the purpose of DC Analysis. After learning biasing, concept of amplifier is important. There are many models to solve amplifier problems. But re model is simple to learn. In GATE exam they ask question only from this model. Also you may be asked about different components in the small signal model like Trans-conductance etc and these parameters can be directly from the DC Analysis.
By practicing some question you can master it. BJT amplifier are more important than FET and MOSFET.

Power Amplifier:
For Electrical GATE paper you need not worry about this topic and it can be left out.

Feedback Amplifier:
In gate exam detailed questions are not asked in this topic. But you should be aware about various topology and its effect on output and input impedances, gain, noise, distortion.You can leave cascade amplifer for GATE exam.

Operational amplifier:
Concept of Operational Amplifer starts with differential amplifier and its various definition like CMRR, slew rate input biasing current etc. Out of these CMRR and slew rate is important.
Most of the questions are asked from basic op amp topology. You can solve them by just applying network theory and mostly centered around the concept of Virtual Ground. These are simple and mostly asked in gate exam. You should also be aware of various Filter Designs as well as they can asked in Control Systems or Network Theory as well.
Also, you should be clear with analysis of Schmitt Trigger as that is one of the most important topic in GATE.

555 Timer:
This is not very much important for electrical guys.

 Overall you can score 3 to 6 marks in this subject easily but just studying few topic. diode and op amp circuit are most simple and important part of this ocean size subject. So guys Analog Electronics is not as daunting from inside as it looks from the outside.

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