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

fYear

2007

fDate

3-5 June 2007

Firstpage

741

Lastpage

744

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits (RFIC) Symposium, 2007 IEEE

Conference_Location

Honolulu, HI

ISSN

1529-2517

Print_ISBN

1-4244-0530-0

Electronic_ISBN

1529-2517

Type

conf

DOI

10.1109/RFIC.2007.380989

Filename

4266537