Title :
All-digital out-phasing modulator for a software-defined transmitter
Author :
Heidari, Mohammad E. ; Lee, Minjae ; Abidi, Asad A.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA
Abstract :
An all-digital out-phasing transmitter suitable for software-defined radio (SDR) is presented. It uses a phase-locked loop followed by two digital phase rotator blocks embedded in two delay-locked loops. The chip is fabricated in a 90 nm CMOS process with total active area of 3 mm2, and tested for GSM and WCDMA standards. The whole transmitter excluding phase-to-digital converter (PDC) consumes 55 mA, and current consumption of the PDC is 70 mA.
Keywords :
CMOS digital integrated circuits; broadband networks; cellular radio; code division multiple access; modulators; radio transmitters; software radio; GSM; WCDMA standards; all-digital out-phasing modulator; current consumption; delay-locked loops; digital phase rotator blocks; phase-locked loop; phase-to-digital converter; software-defined radio; software-defined transmitter; Amplitude modulation; Bandwidth; Filters; GSM; Multiaccess communication; Phase locked loops; Phase modulation; Radio frequency; Radio transmitters; Wideband;
Conference_Titel :
VLSI Circuits, 2008 IEEE Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-1804-6
Electronic_ISBN :
978-1-4244-1805-3
DOI :
10.1109/VLSIC.2008.4585967
