Low-Voltage Low-Power CMOS Radio Frequency Receiver Front-end Circuits
| Autor: | Jih-Hsin Wang, 王日新 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 This thesis introduces the design issues and implementation of low-voltage low-power radio frequency receiver front-end circuits. To operate in heavily reduced supply voltage, different architectures and design techniques have been proposed. The thesis is organized by six chapters. The first chapter illustrates the current technology trend as an introduction. In chapter 2, the background knowledge for low-voltage low-power design is overviewed. In chapter 3, a low-voltage radio frequency transmit/receive switch is proposed. Using inductor/capacitor resonators, this architecture successfully resolves the limitation of poor on/off characteristics of transistor due to low supply voltage. Furthermore, the switch exhibits a low insertion loss in the receive path, as well as a high power handling capability in transmit path. The circuit is implemented using a standard 0.18-um CMOS process. The experimental results are also included in this chapter. In chapter 4, design issues and architectures of low-noise amplifier (LNA) are discussed and analyzed. Based on folded cascode architecture, methods to maximizing LNA characteristics with very low power dissipation (~1mW) are proposed. In addition, a folded cascode LNA adding a gain-enhancement loop is also realized in this chapter. Both circuits are implemented with a standard 0.18-um CMOS process and the measurement results are presented in this chapter. In chapter 5, a low-intermediate frequency polyphase filter incorporating an active structure is implemented to decrease the signal loss due to the loading effect while cascading multistages. Compared with a traditional passive R-C polyphase filter, this low-voltage active polyphase filter using a 0.18-um CMOS process exhibits much lower power dissipation while achieving the same signal gain level. Finally, conclusions are discussed in Chapter 6. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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