Title :
14-bit DR, 20 kHz BW, 2-2 MASH SI-Σ㪔 modulator using low-distortion feedforward topology
Author :
Blumer, Rafael T. ; Prior, Cesar A. ; Martins, João B.
Author_Institution :
Fed. Univ. of Santa Maria, Santa Maria, Brazil
Abstract :
This paper presents the design and simulation results of a switched-current (SI) 2-2 MASH Sigma-Delta Modulator (ΣΔM). The modulator is composed by a low-distortion swing suppression topology which is highly suitable for wideband applications. It was realized using fully-differential circuitry with common-mode feedback. The circuit performs 14-bit dynamic range (DR) up to 5 MHz clock frequency and 20 kHz bandwidth. The modulator was designed in 0.6 μm CMOS technology and was sent to the foundry to prototype.
Keywords :
CMOS integrated circuits; circuit feedback; clocks; feedforward; modulators; network topology; sigma-delta modulation; switched current circuits; ΣΔM; 2-2 MASH SI-ΣΔ modulator; CMOS technology; DR; bandwidth 20 kHz; clock frequency; common-mode feedback; dynamic range; fully-differential circuitry; low-distortion feedforward topology; low-distortion swing suppression topology; size 0.6 mum; switched-current 2-2 MASH sigma-delta modulator; wideband application; CMOS integrated circuits; Modulation; Quantization; Sigma delta modulation; Silicon; Switches; Topology;
Conference_Titel :
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0218-0
DOI :
10.1109/ISCAS.2012.6272105
