Title :
A CMOS dual-switching power-supply modulator with 8% efficiency improvement for 20MHz LTE Envelope Tracking RF power amplifiers
Author :
Hassan, Mehdi ; Asbeck, P.M. ; Larson, Lawrence E.
Author_Institution :
Univ. of California, San Diego, La Jolla, CA, USA
Abstract :
Envelope Tracking (ET) is an efficiency enhancement technique where the power supply of a linear RF power amplifier (PA) follows the envelope of the RF signal. It is specifically effective for the high peak-to-average power ratio (PAPR) signals of modern communication systems. But due to envelope bandwidth expansion and watt-level power requirements, the design of wide bandwidth and high efficiency power supply modulators remains one of the most challenging aspects of ET systems.
Keywords :
CMOS integrated circuits; Long Term Evolution; modulators; power amplifiers; power supply circuits; CMOS dual-switching power-supply modulator; LTE envelope tracking RF power amplifier; PAPR signal; communication system; efficiency improvement; envelope bandwidth expansion; frequency 20 MHz; linear RF power amplifier; peak-to-average power ratio signal; power supply modulator; watt-level power requirement; Bandwidth; Inductors; Modulation; Power amplifiers; Radio frequency; Switches;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2013 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4673-4515-6
DOI :
10.1109/ISSCC.2013.6487772
