86.55% Peak efficiency envelope modulator for 1.5W 10MHz LTE PA without AC coupling capacitor

Author

SiDuk Sung ; Sung-Wan Hong ; Jun-Suk Bang ; Ji-Seon Paek ; Seung-Chul Lee ; Cho, Thomas Byung-Hak ; Gyu-Hyeong Cho

Author_Institution

KAIST, Daejeon, South Korea

fYear

2015

fDate

17-19 June 2015

Abstract

For achieving boost capability and wideband with high efficiency in Envelope Modulator (EM), a newly proposed topology is introduced in this paper. The proposed EM consists of two converters: one is Low Frequency Converter (LFC) with Single Inductor Dual Output (SIDO) and the other is High Frequency Converter (HFC) with wideband capability. The two converters are combined directly in parallel without AC coupling capacitor by employing Low Frequency Current Balancing (LFCB) technique. The chip is implemented in 0.18μm CMOS process achieving 86.55% peak efficiency while tracking a 10MHz LTE envelope signal.

Keywords

CMOS integrated circuits; frequency convertors; AC coupling capacitor; CMOS process; LTE PA; efficiency 86.55 percent; high frequency converter; low frequency converter; low frequency current balancing; peak efficiency envelope modulator; single inductor dual output; size 0.18 mum; Capacitors; Couplings; Frequency conversion; Hybrid fiber coaxial cables; Inductors; Modulation; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits (VLSI Circuits), 2015 Symposium on

Conference_Location

Kyoto

Print_ISBN

978-4-86348-502-0

Type

conf

DOI

10.1109/VLSIC.2015.7231316

Filename

7231316