Three-Level Hybrid Envelope Tracking Supply Modulator with High-Bandwidth Wide-Output-Swing
Source abstract
Abstract
Envelope tracking is a dynamic supply modulation technique, which is mainly used to improve the efficiency of radio frequency power amplifier. For 5G NR mobile devices, this paper presents an envelope tracking supply modulator which is composed of a three-level switching converter and linear amplifier (LA) in parallel. The hysteresis control method is adopted in the supply modulator to improve the bandwidth of the switching converter and the loop response speed. At the same time, a rail-to-rail input-output class AB linear amplifier is designed to achieve a wide output swing and a super source follower is proposed to reduce the output impedance of LA. Designed with the 180 nm CMOS technology, the supply modulator operated at 5G NR 100 MHz envelope signal. The output power of the modulator reaches 1.5 W for a 6 Ω load resistor and the output swing is 4.3 V at 5.0 V supply, and the maximum efficiency reaches 85%.
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Research context
OpenAlex topics: Advanced Power Amplifier Design · Radio Frequency Integrated Circuit Design · Advanced DC-DC Converters
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Opto-Electronic and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China
Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
Zhengzhou Zhongke Institute of Integrated Circuit and System Application, Zhengzhou 450001, China
College of Physics & Electronic Engineering, Nanyang Normal University, Nanyang 473061, China
Funding
National Natural Science Foundation of China · Henan Province Key R&D and Promotion Project (Science and Technology Research) · Zhengzhou Zhongke Institute of Integrated Circuit and System Application Research Dean Fund
References (29)
Show source-provided references
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