题目/Title：An Efficiency-Enhanced 2.4GHz Stacked CMOS Power Amplifier with Mode Switching Scheme for WLAN Applications

作者/Author：
                        Yun Yin,Baoyong Chi,Xiaobao Yu,Wen Jia,Zhihua Wang

会议/Conference：CICC 2014

地点/Location：San Jose, CA

年份/Issue Date：2014.15-17 Sept.

页码/pages：pp. 1 - 4

摘要/Abstract：
A 2.4GHz stacked CMOS power amplifier (PA) with mode switching scheme is proposed to improve back-off efficiency in WLAN applications. The mode switching scheme effectively improves the PAE by 100% at 5dB back-off power by dynamically tuning the PA bias and optimal load with a power detecting controller. With the transistor-stacking and self-biasing techniques and powered by a 5.6V supply, the PA in high power mode (HPM) and low power mode (LPM) achieves the output P1dB of 27dBm with a PAE of 26.1% and 22dBm with a PAE of 21.8%, respectively, while occupying only 1.5mm2 die area in 180-nm CMOS process. In the closed-loop power detecting (PD) mode, the PA achieves -26.9dB EVM at 23dBm output power with 40MHz bandwidth 802.11n signals.