TAILIEUCHUNG - Ebook Electronic devices - Conventional current version (9/e): Part 2

Part 2 book “Electronic devices - Conventional current version” has contents: FET amplifiers and switching circuits, amplifier frequency response, thyristors, the operational amplifier, basic programming concepts for automated testing, voltage regulators, oscillators, and other contents. | FET A MPLIFIERS AND S WITCHING C IRCUITS APPLICATION ACTIVITY PREVIEW CHAPTER OUTLINE 9–1 9–2 9–3 9–4 9–5 9–6 9–7 The Common-Source Amplifier The Common-Drain Amplifier The Common-Gate Amplifier The Class D Amplifier MOSFET Analog Switching MOSFET Digital Switching Troubleshooting Application Activity ◆ ◆ ◆ ◆ ◆ ◆ Explain and analyze the operation of common-source FET amplifiers Explain and analyze the operation of common-drain FET amplifiers Explain and analyze the operation of common-gate FET amplifiers Discuss the operation of a class D amplifier Describe how MOSFETs can be used in analog switching applications Describe how MOSFETs are used in digital switching applications Troubleshoot FET amplifiers KEY TERMS ◆ ◆ ◆ ◆ Common-source Common-drain Source-follower Common-gate A JFET common-source amplifier and a common-gate amplifier are combined in a cascode arrangement for an active antenna. Cascode amplifiers are often used for RF (radio frequency) applications to achieve improved high-frequency performance. In this application, the cascode amplifier provides a high resistance input for a whip antenna, as well as high gain to amplify extremely small antenna signals. VISIT THE COMPANION WEBSITE Study aids and Multisim files for this chapter are available at CHAPTER OBJECTIVES ◆ 9 ◆ ◆ ◆ ◆ Class D amplifier Pulse-width modulation Analog switch CMOS INTRODUCTION Because of their extremely high input resistance and low noise, FET amplifiers are a good choice for certain applications, such as amplifying low-level signals in the first stage of a communication receiver. FETs also have the advantage in certain power amplifiers and in switching circuits because biasing is simple and more efficient. The standard amplifier configurations are common-source (CS), common-drain (CD) and common-base (CB), which are analogous to CE, CC, and CB configurations of BJTs. FETs can be used in any of the amplifier types .

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