A dual-band high efficiency CMOS transmitter for wireless CDMA applications

Author

Deng, Junxiong ; Chew, Mark ; Vora, Sameer ; Cassia, Marco ; Marra, Thomas ; Sahota, Kamal ; Aparin, Vladimir

Author_Institution

Qualcomm Inc., San Diego

fYear

2007

fDate

3-5 June 2007

Firstpage

25

Lastpage

28

Abstract

A dual-band transmitter integrated circuit (TxIC), including baseband filter and variable gain amplifier (VGA), upconverter, RF VGA, driver amplifier (DA), is implemented in 0.18 mum CMOS for CDMA applications. The TxIC increases the handset talk time dramatically with the PA-bypass feature. The chip provides more than a total power control range of 80 dB and a fine gain step of 0.25 dB/LSB. The chip achieves 52.3 dBc ACPR at +7 dBm output power with 52.2 mA and 51.7 dBc ACPR at +7 dBm output power with 51.9 mA for low band and high band applications respectively.

Keywords

CMOS integrated circuits; code division multiple access; radio transmitters; CMOS transmitter; code division multiple access; dual-band transmitter integrated circuit; size 0.18 mum; wireless CDMA application; Application specific integrated circuits; Baseband; CMOS integrated circuits; Dual band; Filters; Multiaccess communication; Power generation; Radiofrequency amplifiers; Radiofrequency integrated circuits; Transmitters; CDMA; CMOS; efficiency; integrated circuit; transmitter;

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.2007.380825

Filename

4266373