Title :
Active bias configuration for UMTS multi-carrier power amplifier
Author :
Zhu, Anding ; Perry, Philip
Author_Institution :
Sch. of Electron. Eng., Dublin City Univ., Ireland
Abstract :
This paper describes a novel, low cost active bias control configuration for a multi-carrier UMTS power amplifier. It consists simply of a detector and a gain-controlled op-amp, which tracks the envelope of an RF input signal to modulate the bias supply current to a standard monolithic amplifier. Simulation results indicate that power efficiency is improved and IMD level is reduced
Keywords :
UHF power amplifiers; cellular radio; intermodulation distortion; 2 GHz; IMD level reduction; UMTS multi-carrier power amplifier; active bias configuration; bias supply current; detector; gain-controlled op-amp; low cost bias control configuration; power efficiency improvement; standard monolithic amplifier; 3G mobile communication; Base stations; Circuits; Costs; Current supplies; Envelope detectors; Operational amplifiers; Power amplifiers; Radio frequency; Radiofrequency amplifiers;
Conference_Titel :
High Frequency Postgraduate Student Colloquium, 2000
Conference_Location :
Dublin
Print_ISBN :
0-7803-6590-9
DOI :
10.1109/HFPSC.2000.874086
