Title :
CMOS Linear High Performance Push Amplifier for WiMAX Power Amplifier
Author :
Tabrizi, Mohammad Moghaddam ; Masoumi, Nasser
Author_Institution :
Sch. of Electron. & Comput., Univ. of Tehran, Tehran, Iran
Abstract :
In this work a novel and efficient approach is used to optimize linearity and efficiency of power amplifier used in mobile WiMAX application. A linear and high performance push amplifier is designed and implemented in 0.18 μm CMOS technology to enhance linearity of class E switched mode power amplifier. Proposed push amplifier has two section; analog and switching section. Analog section provides required linearity and switching section guarantees satisfying total efficiency level. Each block is designed to meet required specifications. The core power amplifier which is a class E switched mode power amplifier is also designed to have maximum possible efficiency. The implemented circuit is simulated using HSPICERF with TSMC RF models for active and passive elements. The proposed power amplifier provides a maximum output power of 25 dBm and power added efficiency (PAE) as high as 48% at 2.5 GHz operation frequency. At 1-dB compression point this PA exhibits 23 dBm of output power with 46% PAE.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF power amplifiers; WiMax; mobile radio; CMOS linear high performance push amplifier; HSPICERF simulation; TSMC RF model; WiMAX power amplifier; class E switched mode power amplifier; efficiency 46 percent; frequency 2.5 GHz; gain 1 dB; mobile WiMAX application; power added efficiency; size 0.18 mum; Linearity; Power amplifiers; Power generation; Radio frequency; Switches; Transistors; WiMAX;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2011 7th International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6250-6
DOI :
10.1109/wicom.2011.6036654
