339a gives ie ib ic 327 b figure 338 two types

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Unformatted text preview: still used today. Our objective is to present enough detail about the BJT to enable us to apply the techniques developed in this chapter to analyze dc transistor circuits. There are two types of BJTs: npn and pnp, with their circuit symbols as shown in Fig. 3.38. Each type has three terminals, designated as emitter (E), base (B), and collector (C). For the npn transistor, the currents and | e-Text Main Menu | Textbook Table of Contents | Problem Solving Workbook Contents CHAPTER 3 Methods of Analysis 103 Collector C n p Base B n E Emitter (a) Collector C p Figure 3.37 B n p Base Various types of transistors. (Courtesy of Tech America.) E Emitter voltages of the transistor are specified as in Fig. 3.39. Applying KCL to Fig. 3.39(a) gives IE = IB + IC (3.27) (b) Figure 3.38 Two types of BJTs and their circuit symbols: (a) npn, (b) pnp. where IE , IC , and IB are emitter, collector, and base currents, respectively. Similarly, applying KVL to Fig. 3.39(b) gives VCE + VEB + VBC = 0 C IC (3.28) IB wh...
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This note was uploaded on 07/16/2012 for the course KA KA 2000 taught by Professor Bkav during the Spring '12 term at Cambridge.

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