Dual-Loop-Controlled AC-Coupling 100MHz Bandwidth Envelope Tracking Modulator for 5G RF Power Amplifier

被引：0
|
作者：
Liu, Fuqiang [1 ]
Chen, Mingfeng [1 ]
Ma, Heng [1 ]
Hong, Zhiliang [1 ]
机构：
[1] Fudan Univ, Sch Microelect, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China
来源：
2019 IEEE 13TH INTERNATIONAL CONFERENCE ON ASIC (ASICON) | 2019年
关键词：
D O I：
暂无
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：
A dual-loop-controlled ac-coupling envelope tracking modulator (ETM) with 100MHz bandwidth is presented. Ac-coupling voltage Voff_AC is stabilized by voltage sensor and the control pulse width can be automatically widened (AWPW), meanwhile an auxiliary automatically widen pulse width (AAWPW) technique is proposed to control ripple voltage. AWPW and AAWPW can significantly reduce switching loss by filtering high switching frequency, leading to overall efficiency improvement. The maximum output power exceeds 2W with a constant load 6 Omega//600pF, maximum ac amplitude is 3V, peak efficiency is 85%.
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页数：4
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