Title :
A 1.2-V dual-mode WCDMA/GPRS /spl Sigma//spl Delta/ modulator
Author :
Dezzani, A. ; Andre, E.
Author_Institution :
Central R&D, STMicroelectronics, Crolles, France
Abstract :
A dual-mode /spl Sigma//spl Delta/ modulator is designed to meet the specifications of a WCDMA/GPRS receiver and is composed of a single-bit second-order modulator followed by a multi-bit stage that adapts performance to broadband signals. The modulator achieves 82dB and 70dB of dynamic range over bandwidths of 100kHz and 1.92MHz, respectively, and dissipates 4.3mW from a 1.2V supply. The circuit is implemented in 0.13/spl mu/m CMOS technology and occupies an active area of 0.2mm/sup 2/.
Keywords :
CMOS integrated circuits; code division multiple access; mobile radio; packet radio networks; radio receivers; sigma-delta modulation; 0.13 micron; 1.2 V; 1.92 MHz; 100 kHz; 4.3 mW; CMOS technology; WCDMA/GPRS receiver; dual-mode sigma-delta modulator; dynamic range; Capacitance; Delta modulation; Digital modulation; Dynamic range; Energy consumption; Ground penetrating radar; Linearity; Multi-stage noise shaping; Multiaccess communication; Operational amplifiers;
Conference_Titel :
Solid-State Circuits Conference, 2003. Digest of Technical Papers. ISSCC. 2003 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-7707-9
DOI :
10.1109/ISSCC.2003.1234206
