Talk on NEP 2020

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Modulation & demodulation

Dear Students

 Here we discuss modulation and demodulation. Go through the following lectures.

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The audio lecture shall be uploaded later.

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Certification: Short term FDP

Principles of feedback & transistor Oscillators

Dear students

 In this lecture, we discuss the principles behind feed back mechanism in transistor amplifiers. The two types of feed back methods such as negative feedback and positive back are discussed. Positive feed back is employed in the case of transistor oscillators. The necessary condition for oscillating circuit, various elements of transistor oscillators, different types of transistor oscillators are discussed here. 

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For audio lecture part 2, CLICK HERE

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Classification of power amplifiers

Dear students

 Power amplifiers are classified into three. Class A, Class B and Class C power amplifiers are them. 

Push pull amplifier is a featured Class B operation with two transistors connected back to back.

The detailed lectures are provided here with

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Introduction to power amplifiers

Dear students

Go through the following lectures regarding an introduction to power amplifiers

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WKB approximation method

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Go through the following lectures regarding WKB approximation method.

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 audio lecture shall be uploaded shortly.

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Practical methods of transistor biasing

Dear students,

Today we discuss the topic transistor biasing. The key points are what is meant by faith ful amplification and what the basic requirements for achieving faithful amplification. Once, the transition achieve faithful amplification, it is said to be properly biased. 

There are different methods for practically biasing a transistor circuit. This is discussed here. In most practical cases CE configuration is used.

Go through the following lectures:

For PDF lecture, CLICK HERE

For audio lecture part 1, CLICK HERE

For audio lecture part 2, CLICK HERE

For audio lecture part 3, CLICK HERE

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Time dependent perturbation theory

Dear students

In this class, we discuss the time dependent perturbation theory. Go through the following links.

For viewing the PDF lecture, CLICK HERE

For audio lecture, CLICK HERE

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