Title :
A 70-mW 300-MHz CMOS continuous-time ΣΔ ADC with 15-MHz bandwidth and 11 bits of resolution
Author :
Patón, Susana ; Di Giandomenico, Antonio ; Hernández, Luis ; Wiesbauer, Andreas ; Pötscher, Thomas ; Clara, Martin
Author_Institution :
Univ. Carlos III de Madrid, Spain
fDate :
7/1/2004 12:00:00 AM
Abstract :
A wide-bandwidth continuous-time sigma-delta ADC is implemented in a 0.13-μm CMOS. The circuit is targeted for wide-bandwidth applications such as video or wireless base-stations. The active blocks are composed of regular threshold voltage devices only. The fourth-order architecture uses an OpAmp-RC-based loop filter and a 4-bit internal quantizer operated at 300-MHz clock frequency. The converter achieves a dynamic range of 11 bits over a bandwidth of 15 MHz. The power dissipation is 70 mW from a 1.5-V supply.
Keywords :
CMOS integrated circuits; RC circuits; continuous time filters; operational amplifiers; quantisation (signal); sigma-delta modulation; 0.13 microns; 1.5 V; 15 MHz; 300 MHz; 70 mW; CMOS sigma-delta ADC; CMOS technology; OpAmp loop filter; RC-based loop filter; active blocks; analog-digital conversion; continuous-time filters; continuous-time sigma-delta ADC; delta-sigma modulation; dynamic range; fourth-order architecture; internal quantizer; low-pass filters; low-voltage design; sigma-delta modulation; threshold voltage devices; video base-stations; wide-bandwidth sigma-delta ADC; wireless base-stations; Bandwidth; Circuits; Clocks; Delta-sigma modulation; Dynamic range; Frequency; Low pass filters; Noise shaping; Power dissipation; Sampling methods; Analog–digital conversion; continuous-time filters; delta-sigma modulation; low-pass filters; low-voltage design; sigma-delta modulation;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2004.829925
