CH10 - Bipolar Junction Transistors

CH10 - Bipolar Junction Transistors - G. Rizzoni,...

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Unformatted text preview: G. Rizzoni, Principles and Applications of Electrical Engineering Problem solutions, Chapter 10 10.1 Chapter 10 Instructor Notes Chapter 10 introduces bipolar junction transistors. The material on transistors has been reorganized in this 4 th Edition, and is now divided into two independent chapters, one on bipolar devices, and one on field-effect devices. The two chapters are functionally independent, except for the fact that Section 10.1, introducing the concept of transistors as amplifiers and switches, can be covered prior to starting Chapter 11 if the instructor decides to only teach field-effect devices. Section 10.2 introduces the fundamental ideas behind the operation of bipolar transistors, and illustrates the calculation of the state and operating point of basic transistor circuits. The discussion of the properties of the BJT in Section 10.2 is centered around a description of the base and collector characteristics, and purposely avoids a detailed description of the physics of the device, with the intent of providing an intuitive understanding of the transistor as an amplifier and electronic switch. Example 10.5 introduces the use of Electronics Workbench (EWB) as a tool for analyzing electronics circuits; the CD- ROM contains an introduction to the software package and a number of solved problems. Section 10.3 introduces large-signal models of the BJT, and also includes the box Focus on Methodology: Using device data sheets (pp. 535-537). Example 10.7 (LED Driver) and the box Focus on Measurements: Large Signal Amplifier for Diode Thermometer (pp. 539-541) provide two application examples that include EWB solutions. Section 8.4 introduces the analysis of BJT switches and presents TTL gates. The end-of-chapter problems are straightforward applications of the concepts illustrated in the chapter. Learning Objectives 1. Understand the basic principles of amplification and switching. Section 1. 2. Understand the physical operation of bipolar transistors; determine and select the operating point of a bipolar transistor circuit; understand the principle of small signal amplifiers. Section 2 . 3. Understand the large-signal model of the bipolar transistor, and apply it to simple amplifier circuits. Section 3 . 4. Understand the operation of bipolar transistor as a switch and analyze basic analog and digital gate circuits. Section 4 . G. Rizzoni, Principles and Applications of Electrical Engineering Problem solutions, Chapter 10 10.2 Section 10.2: Operation of the Bipolar Junction Transistor Problem 10.1 Solution: Known quantities: Transistor diagrams, as shown in Figure P10.1: (a) pnp , V EB = 0.6 V and V EC = 4.0 V (b) npn , V CB = 0.7 V and V CE = 0.2 V (c) npn , V BE = 0.7 V and V CE = 0.3 V (d) pnp , V BC = 0.6 V and V EC = 5.4 V Find: For each transistor shown in Figure P10.1, determine whether the BE and BC junctions are forward or reverse biased, and determine the operating region....
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This note was uploaded on 04/08/2009 for the course ELE ELE1403 taught by Professor Khaled during the Spring '09 term at NYU Poly.

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CH10 - Bipolar Junction Transistors - G. Rizzoni,...

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