Title :
CMOS direct quadrature modulator for W-CDMA transmitter application
Author :
Yusof, A.J. ; Ismail, M.
Author_Institution :
Dept. of Electr., Electron. & Syst., Univ. Kebangsaan Malaysia, Malaysia
Abstract :
This paper discusses quadrature modulator design for W-CDMA applications in CMOS technology. First, receiver topologies were discussed briefly with emphasis on direct conversion and application of quadrature modulator in transmitter. Description of Gilbert cell with mathematical analysis of its operating principle was presented. Next, design of building blocks of modulator was covered including selection of the best topologies for direct quadrature modulator in view of RFIC design trade-off of power consumption and circuit complexity. Lastly, simulation results were presented with comparison with other commercial modulators and results from recent researches.
Keywords :
circuit complexity; code division multiple access; mathematical analysis; power consumption; quadrature phase shift keying; radiofrequency integrated circuits; receivers; transmitters; CMOS direct conversion quadrature modulator; Gilbert cell; RFIC design; W-CDMA transmitter application; circuit complexity; complementary metal-oxide-semiconductor; mathematical analysis; power consumption; radiofrequency integrated circuit; receiver topology; wideband code division multiple access; Batteries; CMOS technology; Circuit simulation; Circuit synthesis; Circuit topology; Costs; Differential amplifiers; Frequency; Multiaccess communication; Radio transmitters;
Conference_Titel :
Communications, 2003. APCC 2003. The 9th Asia-Pacific Conference on
Print_ISBN :
0-7803-8114-9
DOI :
10.1109/APCC.2003.1274396
