Title :
A 0.18-μm CMOS offset-PLL upconversion modulation loop IC for DCS-1800 transmitter
Author_Institution :
SoC Technol. Center, Ind. Technol. Res. Inst., Hsinchu, Taiwan
Abstract :
A DCS-1800 offset-PLL upconversion modulation loop IC, which is fabricated in a 0.18-μm CMOS technology, is presented in this paper. This IC operates at 2.8 V supply voltage with a current consumption of 36 mA. The measured r.m.s. and peak phase errors of the GMSK transmission signal are 1.6 and 4 degree, respectively. It is shown that such circuit can be implemented in a CMOS process with current dissipation and performance comparable to BiCMOS commercial products. The advantages of an upconversion modulation loop and the design issues of IQ modulators are also described in this paper.
Keywords :
CMOS integrated circuits; UHF integrated circuits; cellular radio; minimum shift keying; modulators; phase locked loops; radio transmitters; 0.18 micron; 1785 MHz; 2.8 V; 36 mA; CMOS upconversion modulation loop IC; DCS-1800 transmitter; GMSK transmission signal; IQ modulators; deep submicron CMOS technology; offset-PLL upconversion modulation loop; transmitter architecture; BiCMOS integrated circuits; CMOS integrated circuits; CMOS process; CMOS technology; Phase frequency detector; Phase modulation; Radio frequency; Transceivers; Transmitters; Voltage-controlled oscillators;
Conference_Titel :
ASIC, 2002. Proceedings. 2002 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-7363-4
DOI :
10.1109/APASIC.2002.1031593
