A highly integrated CMOS zero-IF transmitter for cellular CDMA applications

Author

Zhou, Jianjun ; Sheng, Wenjun ; Zhang, Xuejun ; Kim, Namsoo ; Woolfrey, John ; Margarit, Mihai ; Vora, Sameer ; Persico, Charlie

Author_Institution

QUALCOMM Inc., San Diego, CA, USA

fYear

2005

Firstpage

17

Lastpage

20

Abstract

This first commercially available CMOS CDMA transmitter IC is based on a zero-IF architecture and designed for US/China/Korea and Japan cellular bands. The transmitter IC integrates direct upconverter, VGA, driver amplifier, VCO, and both transmit and receive PLLs in 0.24 μm CMOS. The chip provides more than 100 dB power control range and consumes 57.5 mA at 2.6 V with +6 dBm output power and -51.7 dBc ACPR.

Keywords

CMOS analogue integrated circuits; UHF amplifiers; UHF integrated circuits; cellular radio; code division multiple access; phase locked loops; radio transmitters; voltage-controlled oscillators; 0.24 micron; 2.6 V; 57.5 mA; 824 to 849 MHz; 887 to 925 MHz; ACPR; CDMA RFIC; VCO; VGA; cellular radio transmitter; direct upconverter; driver amplifier; highly integrated zero-IF transmitter; power control range; transmit/receive PLL; Baseband; CMOS integrated circuits; Driver circuits; Gain control; Multiaccess communication; Power amplifiers; Proportional control; Radiofrequency amplifiers; Signal generators; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE

ISSN

1529-2517

Print_ISBN

0-7803-8983-2

Type

conf

DOI

10.1109/RFIC.2005.1489174

Filename

1489174