Title :
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
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 fs 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;
Conference_Titel :
Mixed Design of Integrated Circuits & Systems (MIXDES), 2015 22nd International Conference
Conference_Location :
Torun
Print_ISBN :
978-8-3635-7806-0
DOI :
10.1109/MIXDES.2015.7208539
