Title :
High efficiency CDMA power amplifier with dynamic current control circuits
Author_Institution :
Skyworks Solutions Inc., Newbury Park, CA, USA
Abstract :
This work presents a PCS band linear power amplifier with high average efficiency using a dynamic quiescent current control circuit. A dynamic quiescent current control circuit, which enables the quiescent current to be gradually increased with control voltage increase, has been designed using InGaP/GaAs HBT technology. The 2-stage amplifier has been implemented to demonstrate the superior performance of the proposed control scheme compared to classical discrete mode control. With IS95B reverse-link signal, this amplifier shows about 2 times higher average efficiency than that of the discretely controlled amplifier.
Keywords :
III-V semiconductors; code division multiple access; electric current control; heterojunction bipolar transistors; power amplifiers; power electronics; semiconductor technology; 2-stage amplifier; GaAs; IS95B reverse-link signal; InGaP; InGaP-GaAs HBT technology; PCS band linear power amplifier; discrete mode control; discretely controlled amplifier; dynamic quiescent current control circuit; high efficiency CDMA power amplifier; Circuits; Current control; Gallium arsenide; Heterojunction bipolar transistors; High power amplifiers; Multiaccess communication; Power amplifiers; Radiofrequency amplifiers; Telephone sets; Voltage control;
Conference_Titel :
Compound Semiconductor Integrated Circuit Symposium, 2004. IEEE
Print_ISBN :
0-7803-8616-7
DOI :
10.1109/CSICS.2004.1392484
