A 5-GHz Quadrature Switched-Capacitor Power Amplifier With IQ-Cell-Sharing and Serial Transformer Combiner in 28-nm CMOS

被引：0
作者：
Zheng, Diyang [1 ]
Li, Yicheng [1 ]
Chen, Hang [1 ]
Yin, Yun [1 ]
Xu, Hongtao [1 ]
机构：
[1] Fudan Univ, Sch Microelect, State Key Lab Integrated Chips & Syst, Shanghai 201203, Peoples R China
来源：
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS | 2024年 / 34卷 / 07期
关键词：
Power amplifiers; Power generation; Power combiners; Transformers; Switches; Impedance; Coils; CMOS; digital power amplifier (DPA); in-phase and quadrature (IQ)-cell-sharing; quadrature; serial-combining transformer (SCT);
D O I：
10.1109/LMWT.2024.3405498
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This letter presents a 5-GHz quadrature digital power amplifier (DPA) with serial transformer power combiner and in-phase and quadrature (IQ)-cell-sharing, which overcomes the 3-dB power loss in the conventional quadrature counterpart. A four-way differential serial-combining transformer (SCT) power combiner is adopted for output power close to the watt level. Implemented in 28-nm CMOS technology, the DPA is powered by 1.1-/2.2-V power supplies and only occupies 0.98 x 0.58 mm(2) core area. It achieves 28.6-dBm peak output power with power added efficiency (PAE) of 24.4% at 5 GHz. With 20-MHz 64-quadraticamplitude modulation (QAM) 802.11ac signal, the DPA achieves Pavg of 18.6 dBm and average PAE of 10.7% with -25.0 dB error vector magnitude (EVM) at 5 GHz with digital predistortion (DPD).
引用
收藏
页码：919 / 922
页数：4
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