A 20MHz Low Dropout Controlled Current Sensor for Constant On-Time Based Envelop Tacking Supply Modulator for Radio Frequency Power Amplifier

Wei Ting Lin, Zong Yi Lin, Chia Hao Liu, Ke-Horng Chen, Ying Hsi Lin, Jian Ru Lin, Tsung Yen Tsai

研究成果: Conference contribution同行評審

摘要

This paper presents a LDO-controlled current sensor for accelerating constant on-time (COT) switching regulators (SWRs) for high efficiency envelope tracking power modulators (ETSMs) for RF power amplifiers (RF PAs). The proposed LDO-controlled current sensor controls the feedback loop of the SWR, rather than the traditional current sensing technique, in the case of fast envelope tracking. The LDO regulator behaves as the master to rapidly trigger the SWR as a slave energy provider to rapidly deliver the average energy to the RF PA for high efficiency. The experimental results show that the test chip fabricated in 0.18μm CMOS process can accurately track the RF envelope signal, and the peak efficiency is 86.7% when the power is 0.95W.

原文English
主出版物標題2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018 - Proceedings
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781538648810
DOIs
出版狀態Published - 26 四月 2018
事件2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018 - Florence, Italy
持續時間: 27 五月 201830 五月 2018

出版系列

名字Proceedings - IEEE International Symposium on Circuits and Systems
2018-May
ISSN(列印)0271-4310

Conference

Conference2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018
國家Italy
城市Florence
期間27/05/1830/05/18

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