Title :
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
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;
Conference_Titel :
Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE
Print_ISBN :
0-7803-8983-2
DOI :
10.1109/RFIC.2005.1489174
