Design of A High-Efficiency 2.6GHz CMOS Doherty Power Amplifier
| Autor: | Wen-Yan Hsiao, 蕭文彥 |
|---|---|
| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 As the rapid development of mobile communications, many applications make use of wireless communication to carry their works out. The radio frequency (RF) power amplifier plays a crucial role in mobile devices for survival since it dominates about 60 to 90% of the energy consumptions in the RF transceiver. Moreover, the output power will decide the communication range and the power-added efficiency (PAE) will affect the degree of the power consumption, i.e., the surviving time of the mobile device. However, it is conflict to design a power amplifier so that it both enhances the PAE and its linearity. In the applications of highly efficient power amplifier, the Doherty power amplifier not only has a simple architecture but also has a better output efficiency and linearity. Moreover, in the linear power amplifier, the class A power amplifier has the characteristic of higher linearity and the class AB power amplifier has the characteristics of higher output efficiency. Thus, in this thesis, we combine the merits of both class A and class AB power amplifier with Doherty power amplifier to achieve the goal of high linearity and efficiency of power amplifier. The implementation of the designed circuit is based on TSMC 0.18μm 1P6M CMOS process. The bias power supply of the circuit is 1.8 voltage. When the circumstance of two amplifiers being activated, the electric current is 482 mA, the maximum output power is 21.7 dBm, the maximum power gain is 13.3 dB and the maximum power efficiency will reach 48%. Keyword：power amplifier, output power, PAE, linearity, Doherty power amplifier, CMOS |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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