Title :
A 0.9 V 1.5 mW continuous-time ΔΣ modulator for WCDMA
Author :
Ueno, Takeshi ; Itakura, Tetsuro
Author_Institution :
Toshiba, Kawasaki, Japan
Abstract :
A second-order continuous-time ΔΣ modulator for a WCDMA RX is implemented with inverter-based OTAs, enabling operation at a voltage of 0.9 V. The OTAs are balanced by using CMFB. The modulator consumes only 1.5 mW and occupies 0.12 mm2 in a 0.13 μm CMOS process. SNDR is 50.9 dB over a bandwidth of 1.92 MHz.
Keywords :
CMOS integrated circuits; code division multiple access; continuous time filters; delta-sigma modulation; distortion; integrated circuit noise; low-power electronics; operational amplifiers; radio receivers; 0.13 micron; 0.9 V; 1.5 mW; 1.92 MHz; CMFB balanced OTA; CMOS process; SNDR; WCDMA; WCDMA RX; bandwidth; continuous-time ΔΣ modulator; inverter-based OTA; modulator power consumption; operation voltage; second-order continuous-time delta-sigma modulator; CMOS process; CMOS technology; Delta modulation; Feedback; Low voltage; Multiaccess communication; Operational amplifiers; Resistors; Sampling methods; Switches;
Conference_Titel :
Solid-State Circuits Conference, 2004. Digest of Technical Papers. ISSCC. 2004 IEEE International
Print_ISBN :
0-7803-8267-6
DOI :
10.1109/ISSCC.2004.1332602
