Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/141602
Title: | A 2.5-W 40-MHz-bandwidth hybrid supply modulator with 91% peak efficiency, 3-V output swing, and 4-mV output ripple at 3.6-V supply | Authors: | He, Huiqiao Kang, Yang Ge, Tong Guo, Linfei Chang, Joseph Sylvester |
Keywords: | Engineering::Electrical and electronic engineering | Issue Date: | 2018 | Source: | He, H., Kang, Y., Ge, T., Guo, L., & Chang, J. S. (2019). A 2.5-W 40-MHz-bandwidth hybrid supply modulator with 91% peak efficiency, 3-V output swing, and 4-mV output ripple at 3.6-V supply. IEEE Transactions on Power Electronics, 34(1), 712-723. doi:10.1109/TPEL.2018.2827396 | Journal: | IEEE Transactions on Power Electronics | Abstract: | We describe a supply modulator comprising a proposed delay-based hysteresis controller, proposed wideband class-AB amplifier, and class-D amplifier for an envelope tracking (ET) power amplifier (PA). We investigate the power dissipation and optimization method of the supply modulator for wideband applications taking into consideration the propagation delay, and show that a controller with zero threshold current not only improves the bandwidth of the supply modulator but also reduces its power dissipation. Based on our investigations, we propose a delay-based hysteresis controller embodying a novel high-speed current comparator whose reference current (threshold current) is zero, thereby achieving higher power-efficiency and simpler hardware. We further propose a class-AB amplifier, which features a high bandwidth and accurately controlled quiescent current. The proposed supply modulator features simultaneously the wide bandwidth (40 MHz), high output power (2.5 W), high peak efficiency (91%), high output voltage swing (3 V), and low output ripple noise (4 mVrms) at 3.6-V supply. The ET PA embodying our proposed supply modulator achieves a high power-efficiency of 41.4% at 28.5-dBm peak output power and 34.4% at 3-dB backoff- A significant >1.6× improvement over the radio frequency PA without the supply modulator. | URI: | https://hdl.handle.net/10356/141602 | ISSN: | 0885-8993 | DOI: | 10.1109/TPEL.2018.2827396 | Schools: | School of Electrical and Electronic Engineering | Rights: | © 2018 IEEE. All rights reserved. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | EEE Journal Articles |
SCOPUSTM
Citations
20
25
Updated on Mar 17, 2024
Web of ScienceTM
Citations
20
20
Updated on Oct 28, 2023
Page view(s)
162
Updated on Mar 19, 2024
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.