DocumentCode
3487700
Title
High-linearity CMOS feedforward power amplifier for WiMAX application
Author
Liao, Hsien-Yuan ; Chen, Jhih-Hong ; Chiou, Hwann-Kaeo ; Chen, Cheng-Chung
Author_Institution
Dept. of Electr. Eng., Nat. Central Univ., Jhongli
fYear
2008
fDate
16-20 Dec. 2008
Firstpage
1
Lastpage
4
Abstract
A high-linearity CMOS feedforward power amplifier has been proposed. The class-C and class-AB amplifiers were combined to perform a differential circuit, which was utilized as the error amplifier to cancel the third-order nonlinear signal with the main amplifier. Therefore, the linearity of the feedforward power amplifier was improved. At the operation frequency of 2.6 GHz, the measured output IP3 and ACPR are 33.2 dBm and -59 dBc, respectively. Thus, the feedforward architecture is very suitable for high linear power amplifier design.
Keywords
CMOS integrated circuits; WiMax; power amplifiers; WiMAX application; class-AB amplifiers; class-C amplifiers; frequency 2.6 GHz; high-linearity CMOS feedforward power amplifier; third-order nonlinear signal; Circuit testing; Differential amplifiers; High power amplifiers; Linearity; Microwave technology; Power amplifiers; Power measurement; Radio frequency; Radiofrequency amplifiers; WiMAX;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location
Macau
Print_ISBN
978-1-4244-2641-6
Electronic_ISBN
978-1-4244-2642-3
Type
conf
DOI
10.1109/APMC.2008.4958350
Filename
4958350
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