Investigation of parallel hybrid CMOS envelope amplifier designed on AMS 0.35 μm process

Author

Brusev, Tihomir ; Uzunov, Ivan ; Kunov, Georgi ; Gadjeva, Elissaveta

Author_Institution

Fac. of Telecommun., Tech. Univ. of Sofia Sofia, Sofia, Bulgaria

fYear

2015

Firstpage

339

Lastpage

342

Abstract

Customer demands for battery powered portable electronic devices have increased. Today high data rates could be transmitted using fourth generation Long-Term Evolution (4G LTE) wireless communications standard. To increase system runtime proper envelope amplifier´s architecture has to be selected. Using envelope tracking technique efficiency of the transmitter´s power amplifier (PA) can be improved. In this paper different circuit architectures of envelope amplifier are considered. Parallel combined hybrid structure is designed using CMOS 0.35 μm technology. Switching-mode buck converter operates with switching frequency f_s up to 80 MHz to address the wide bandwidth of LTE envelope. The maximum simulated efficiency of the envelope amplifier is 79. 8%.

Keywords

4G mobile communication; CMOS analogue integrated circuits; Long Term Evolution; hybrid integrated circuits; integrated circuit design; power amplifiers; switching convertors; 4G LTE; AMS; battery powered portable electronic devices; circuit architectures; envelope tracking technique; fourth generation Long-Term Evolution wireless communications; frequency 80 MHz; hybrid CMOS envelope amplifier; power amplifier; size 0.35 mum; switching-mode buck converter; Bandwidth; CMOS integrated circuits; Power amplifiers; Regulators; Standards; Switches; Switching circuits; 4G LTE; CMOS technology; Cadence; efficiency; envelope amplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Mixed Design of Integrated Circuits & Systems (MIXDES), 2015 22nd International Conference

Conference_Location

Torun

Print_ISBN

978-8-3635-7806-0

Type

conf

DOI

10.1109/MIXDES.2015.7208539

Filename

7208539