Chapter 4 BJT1 - Chapter 4 Bipolar Junction Transistor (BJ...

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SJTU J. Chen 1 3/2/12 Chapter 4 Bipolar Junction Transistor (BJ T)
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3/2/12 2 J. P C h e n Introduction Three-terminal devices are far more useful than two-ter minal ones, because they can be used in a multitude of applications, signal amplification digital logic memory circuits. …… The basic principle  the use of the voltage between two terminals to control the current flowing in the third termi nal. Transistor = trans fer re sistor
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3/2/12 3 J. P C h e n Part 1. Physical Operation and Current-Volt age Characteristics. Part 2. DC analysis of transistor circuits ; Small Signal Operation and Models Part 3. The basic single-stage BJT amplifier and configurations Content
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SJTU J. Chen 4 3/2/12 Part 1. Physical Operation and Current-Voltage Characteristics .
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3/2/12 5 J. P C h e n Physical Structure Circuit Symbols for BJTs Modes of Operation Basic Characteristic Introduction
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3/2/12 6 J. P C h e n Transistor Transistor is a three-terminal device, made of silicon (Germanium was early used) There are two types: NPN and PNP b) pnp transistor. a) npn transistor Simplified structure
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3/2/12 7 J. P C h e n Circuit symbol of the transistor The emitter is distinguished by the arrowhead.
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3/2/12 8 J. P C h e n Physical Structure emitter region ( n type) base region ( p type) collector region ( n type) emitter (E) base (B) collector (C) emitter-base junction (EEJ) collector-base junction (CBJ). Three regions: Three terminals Two pn junctions: EEJ CBJ emitter region base region collector region c collector b base emitter N P N+ e
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3/2/12 9 J. P
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This note was uploaded on 03/02/2012 for the course EI 207 taught by Professor Chengjianping during the Fall '10 term at Shanghai Jiao Tong University.

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Chapter 4 BJT1 - Chapter 4 Bipolar Junction Transistor (BJ...

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