Bipolar junction Transistors 1. Introduction The Bipolar Junction Transistor (BJT) is one of the most important solid-state devices. It is a two-junction‚ three-terminal device‚ in which the current flow properties of one p-n junction can be modulated by another p-n junction. The structure can be either p-n-p or n-p-n. The three terminals are called emitter‚ base and collector. The circuit symbols of the two types of BJT are shown in Fig.1. The arrow on the emitter signifies the direction of
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BASIC ELECTRONICS MODULE 3 Bipolar Junction Transistor Prepared by H V Balachandra Achar Senior Lecturer‚ Dept. of E&C Engg.‚ M I T‚ Manipal Department of Electronics and Communication Engineering‚ Manipal Institute of Technology‚ Manipal‚ INDIA Syllabus • • • • • • • • Introduction to Bipolar Junction Transistor BJT Operation BJT Configurations Tutorials BJT Biasing Tutorials BJT Amplifier Tutorials Department of Electronics and Communication Engineering‚
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Sixty-one years ago last November‚ John Bardeen and Walter Brattain discovered the transistor at Bell Labs‚ in 1951. Before this‚ electronics used tubes‚ which happened to be extremely bulky‚ generated lots of heat‚ and had short life spans. The invention of smaller‚ more efficient‚ and more durable transistors brought a revolution in electronics. They became an important discovery that changed the world forever. The first ideas and experimentation with solid-state electronics began in 1874‚ but
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Transistor A transistor is a semiconductor device used to amplify and switch electronic signals. It is made of a solid piece of semiconductor material‚ with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor’s terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much more than the controlling (input) power‚ the transistor provides amplification of a signal. Today
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The single-transistor inverter circuit illustrated earlier is actually too crude to be of practical use as a gate. Real inverter circuits contain more than one transistor to maximize voltage gain (so as to ensure that the final output transistor is either in full cutoff or full saturation)‚ and other components designed to reduce the chance of accidental damage. Shown here is a schematic diagram for a real inverter circuit‚ complete with all necessary components for efficient and reliable operation:
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Transistor http://people.senecac.on.ca/john.kawenka/EDV255/bjt.html can i help you ?? The name transistor comes from transferring an electrical signal across a resistor A transistor is a three-terminal semiconductor device that can perform two functions that are needed to design an electronic circuits as (amplification and switching ) transistor switch is a device for controlling a relatively large current between or voltage across two terminals by means of a small control current
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TRANSISTOR The name is transistor derived from ‘transfer resistors’ indicating a solid state Semiconductor device. In addition to conductor and insulators‚ there is a third class of material that exhibits proportion of both. Under some conditions‚ it acts as an insulator‚ and under other conditions it’s a conductor. This phenomenon is called Semi-conducting and allows a variable control over electron flow. So‚ the transistor is semi conductor device used in electronics for amplitude. Transistor
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Aero2 Signals & Systems (Part 2) Notes on BJT and transistor circuits Bipolar Junction Transistors • Physical Structure & Symbols • NPN n-type Emitter region p-type Base region n-type Collector region C Collector (C) B E (b) Emitter (E) Emitter-base junction (EBJ) Base (B) (a) Collector-base junction (CBJ) • PNP - similar‚ but: • N- and P-type regions interchanged • Arrow on symbol reversed • Operating Modes Operating mode Cut-off Active Saturation Reverse-active EBJ Reverse
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Experiment No: 9 Date: COMMON BASE CHARACTERISTICS OF A TRANSISTOR Aim: To plot the input and output characteristics of an NPN transistor in common base configuration and calculate various parameters. Components and Equipments Required: Transistor‚ voltmeters‚ ammeters‚ rheostats‚ dc sources‚ breadboard and CRO. Theory: In CB configuration‚ the base of a transistor is common to input and output circuits. Input voltage is applied between emitter and base and output is taken across collector and
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Unit-II: MOS/BiCMOS Process Technology and Integration Introduction BiCMOS = CMOS + Bipolar (BJT) structures on the same substrate. Advantanges of CMOS device: 1. Low Power 2. High digital IC density. Advantages of Bipolar transistors: 1. Ability to deliver large drive currents 2. Capability to rapidly charge heavy loads. The implementation of digital bipolar circuits with emitter-coupled logic (ECL) gates permits small logic swings and excellent noise immunity
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