Chapter41_BJT-Basics

Chapter41_BJT-Basics - Chapter 4 The BJT Bipolar Junction...

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Chapter 4 – The BJT Bipolar Junction Transistor 4.1 BJT Basics (Structure, Symbols, Parameters) 4.2 Static Analysis 4.3 BJT Circuit Models (Ebers-Moll, Hybrid-Pi) 4.4 SPICE Analysis Literature: Pierret, Chapter 10-12, page 371-462 Jaeger, Blalock, Chapter 5, page 207-261 Slides courtesy of Prof. Oliver Brand
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4.1 BJT Basics 4.1.1 Structure and Fabrication 4.1.2 Terminology and Effects Circuit Symbols Circuit Configurations Modes of Operation 4.1.3 Basic Operation Equilibrium Active Mode Pierret, Chapter 10, page 371-385 Slides courtesy of Prof. Oliver Brand
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3 4.1.1 BJT Structure & Fabrication BJT – Bipolar Junction Transistor Bipolar : electrons and holes participate in the conduction process Junction : two coupled pn-junctions with a joint base region Transistor : transistor action requires that the base width W is much smaller than the minority carrier diffusion length L in the base W << L = τ
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4 Basic Device Structures PNP Transistor Easier to explain and understand N A,E » N D,B > N A,C NPN Transistor More common in device applications, because of the larger mobility of the minority carriers (electrons) in the base N D,E » N A,B > N D,C E B C p + n p Emitter Base Collector E B C n + p n Emitter Base Collector
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5 NPN BJT Cross-Section
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This note was uploaded on 10/12/2011 for the course ECE 3040 taught by Professor Hamblen during the Fall '07 term at Georgia Tech.

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Chapter41_BJT-Basics - Chapter 4 The BJT Bipolar Junction...

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