A 40-MHz 85.8%-peak-efficiency switching-converter-only dual-phase envelope modulator for 2-W 10-MHz LTE power amplifier

Author

Sankman, Joseph ; Min Kyu Song ; Dongsheng Ma

Author_Institution

Integrated Syst. Design Lab., Univ. of Texas at Dallas, Dallas, TX, USA

fYear

2014

fDate

10-13 June 2014

Firstpage

1

Lastpage

2

Abstract

In conventional envelope modulators, a linear regulator is required to attain fast tracking, but it is a significant source of efficiency degradation. To eliminate the linear regulator, a dual-phase switching converter with synchronized adaptive voltage tracking (SAVT) control is employed. The SAVT control enables synchronization and fast hysteretic response for voltage tracking. To overcome the switching converter slew rate limit, a push-pull slew rate enhancer is implemented. The modulator is fabricated with a 0.18μm process and achieves 85.8% peak efficiency tracking a 10MHz LTE envelope.

Keywords

Long Term Evolution; VHF amplifiers; modulators; radiofrequency power amplifiers; switching convertors; synchronisation; LTE power amplifier; SAVT control; efficiency 85.8 percent; efficiency degradation; frequency 10 MHz; frequency 40 MHz; hysteretic response; linear regulator; push-pull slew rate enhancer; size 0.18 mum; switching converter slew rate limit; switching-converter-only dual-phase envelope modulator; synchronized adaptive voltage tracking control; Abstracts; Feedback control; Noise; Phase modulation; Regulators; Switches; Synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits Digest of Technical Papers, 2014 Symposium on

Conference_Location

Honolulu, HI

Print_ISBN

978-1-4799-3327-3

Type

conf

DOI

10.1109/VLSIC.2014.6858440

Filename

6858440