A CMOS switching power amplifier for ΔΣ digitized polar RF transmitter

Author

Paek, Ji-Seon ; Lee, Hyun-Yong ; Lee, Hongtak ; Hong, Songcheol

Author_Institution

Sch. of EECS, Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea

fYear

2010

fDate

10-14 Jan. 2010

Firstpage

53

Lastpage

56

Abstract

A CMOS switching power amplifier for ΔΣ digitized polar RF transmitter is implemented in 0.18-μm process. A current source is introduced in the proposed switching PA to achieve ΔΣ digitized amplitude modulation. The modulation with the current source is suitable for high speed modulated signal such as an oversampled ΔΣ signal. The PA operates at 910 MHz with the maximum output power of 23.5 dBm and power efficiency of 55.4% at the maximum output power. The maximum output power range with the current source modulation is 31 dB.

Keywords

CMOS analogue integrated circuits; amplitude modulation; delta-sigma modulation; power amplifiers; radio transmitters; ΔΣ digitized polar RF transmitter; CMOS switching power amplifier; current modulation; digitized amplitude modulation; frequency 910 MHz; size 0.18 micron; Amplitude modulation; CMOS technology; Communication switching; Digital modulation; Linearity; Power amplifiers; Power generation; Radio frequency; Radio transmitters; Radiofrequency amplifiers; Current modulation; polar transmitter; sigma-delta; switch-mode CMOS power amplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Symposium (RWS), 2010 IEEE

Conference_Location

New Orleans, LA

Print_ISBN

978-1-4244-4725-1

Electronic_ISBN

978-1-4244-4726-8

Type

conf

DOI

10.1109/RWS.2010.5434218

Filename

5434218