Title :
1.8-GHz CMOS Power Amplifier with Stage-Convertible Structure Using Differential Line Inductor
Author :
Park, Changkun ; Lee, Dong Ho ; Lee, Yumi ; Han, Jeonghu ; Baek, Sang-Hyun ; Kim, Younsuk ; Hong, Songcheol
Author_Institution :
Korea Adv. Inst. of Sci. & Technol., Daejeon
Abstract :
A 1.8 GHz power amplifier for a polar transmitter application is implemented with 0.18 mum RF CMOS technology, and a differential line inductor is proposed for the differential circuit. The differential line inductor is used as a low power matching network in the stage-convertible power amplifier in order to increase the efficiency of a low output power region. The power amplifier achieved a power-added efficiency of 41% at a maximum output power of 31.5 dBm. The low power efficiency improvement for the power amplifier is 81% at an output power of 20 dBm.
Keywords :
CMOS integrated circuits; UHF power amplifiers; CMOS power amplifier; differential line inductor; frequency 1.8 GHz; power matching network; stage-convertible structure; CMOS technology; Differential amplifiers; Impedance; Inductance; Inductors; MMICs; Power amplifiers; Power generation; Radiofrequency amplifiers; Spirals; CMOS; Class E; line inductor; polar transmitter; power amplifier; stage-convertible;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0530-0
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2007.380989
