2010•臺灣大學電子工程學研究所學位論文Requires access
應用於WLAN 802.11g AB類功率放大器
張鈞凱
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Abstract
This thesis presents the development of 2.4GHz ISM-band CMOS power amplifier in TSMC 0.18um 1P6M CMOS process. The first main part is on the design of power amplifier. We use two layer metal lines to design the inductor in output matching network at output stage. It can increase the Q factor, and reduce the loss, the PAE can be improved. The measurements have shown this power amplifier provides a gain of 19dB at 2.4GHz, and the output power transmits 20dBm power with 25% power added efficiency at 1-dB compression point. The maximum output power of this amplifier is 22.5dBm with its power added efficiency as 36%. The second main part is a method of improving the efficiency. Compared with the conventional architectures of power amplifier. We presented the circuit technique of current reused. To make the two stage power amplifier using the same current, and improving the power added efficiency by reducing the DC power consumption. The simulations have shown this power amplifier provides a gain of 19dB at 2.4GHz, and the output power transmits 18.8dBm power with 31% power added efficiency at 1-dB compression point. The maximum output power of this amplifier is 19.9dBm with its power added efficiency as 36%.