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该论文提出了一种面向802.11g应用的0.23mm²数字功率放大器（DPA），采用混合时间/幅度控制技术，在22.5dBm输出功率下实现28%的功率附加效率（PAE）。主要解决了传统DPA在高数据速率系统中因高峰均比导致的回退效率低的问题。
Ashkan Olyaei2, Ovidiu Carnu2, Philip Godoy2, Alden Wong2, Xingliang Zhao2, Jiexi Liu2, Arnab Mitra2, Randy Tsang2, Li Lin2 Marvell, Etoy, Switzerland 2 Marvell, Santa Clara, CA 1 Integration of digital RF transmitters and digital power amplifiers (DPA) is becoming of great interest for systems-on-chip (SoCs) available in nanometer technologies [1]. Small and high-speed switching devices directly benefit switching power amplifiers in achieving peak power with high peak efficiency. However PA back-off efficiency remains a big challenge in high-data-rate systems with large peak-to-average ratio (PAR) such as in WLAN. Different solutions have been published to enhance power backoff efficiency but at a cost of higher complexity and larger area [2,3]. This work presents a WLAN DPA based on hybrid time/amplitude control for best power and area efficiency. In a conventional amplitude-controlled DPA, output
David Cousinard1, Renaldi Winoto2, Hao Li2, Yuan Fang2, Amir Ghaffari2,