NN BHARGAVA BASIC ELECTRONICS PDF

Unit 8 Small-Signal Amplifiers 8. I Tutorial Sheet A team of authors worked very hard to prepare the material in a very simple language to clarify each and every concept. This book proved to be extremely useful and appropriate support material for students as well as teachers.

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Unit 8 Small-Signal Amplifiers 8. I Tutorial Sheet A team of authors worked very hard to prepare the material in a very simple language to clarify each and every concept. This book proved to be extremely useful and appropriate support material for students as well as teachers.

Hence, it was widely accepted as a basic textbook. Early development in the field of electronics used vacuum tube devices. But in , the wonder device, called transistor, was invented. Soon people started using this tiny device in place of bulky vacuum tubes. However, these semiconductor devices had some limitations; they could not work at high power and high frequencies. Therefore, the use of vacuum tube devices continued in many applications. At the time when the text of first edition was developed, both vacuum tubes and semiconductor devices were in use.

The knowledge of vacuum tubes was as important as that of semiconductor devices. This book is the result of above-mentioned changes. We hope that the current edition enjoys as much popularity as the first one. You were interested in radio ifyou were intereste9 in electronics. Compared to the more established branches such as civil, mechanical, electrical, etc.

Until recently, it was considered an integral part of electrical engineering, but due to the tremendous advancement during the last few decades, it has now gained its rightful place. We shall study, in the chapters that follow, how electronic devices function, and how they could be used to advantage in our daily life.

I Life today offers many conveniences which involve the use of electronic devices. As can be seen from Table 1. During the earlier part of last century, the main application of electronics was in the field of telegraphy and telephony. This utilises a pair of wires.

However, it is now possible with the help of radio waves to transmit any message from one place to another, thousands of kilometres away, without any wires. With such wireless communication radio broadcasting , people in any part of the world can know what is happening in othe. With the help of a teleprinter, it is possible to type the message on a typewriter kept in another city.

Photographs of events occurring somewhere, can be transmitted on facsimile radiophoto. They can then be printed in the newspapers all over the world. Radio and TV broadcasting provide a means of both communication as well as entertainment.

With the help of satellites it has become possible to establish instant communication between places very far apart. Electronic gadgets like CD players, stereo systems, video games, public-address systems, etc. By using radar, it is possible not only to detect, but also to find the exact location of the enemy aircraft. The anti-aircraft guns can then be accurately directed to shoot down the aircraft.

In fact, the radar and the anti-aircraft guns can be linked by an automatic control system to make a complete unit. Introduction to Electronics.

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