Title :
A 1.1 V low-power ΣΔ modulator for 14-b 16 kHz A/D conversion
Author :
Muñoz, F. ; VegaLeal, A.P. ; Carvajal, R.G. ; Torralba, Antonio ; Tombs, J. ; Angulo, J. Ramírez
Author_Institution :
Dept. de Ingegneria Electron., Seville Univ., Spain
Abstract :
This paper presents a second order ΣΔ modulator implementation for a supply voltage of 1.1 V. A new fully-differential CMOS operational amplifier has been designed in order to achieve high-resolution under very-low-voltage operation. The design relies on the elimination of critical switches by using a voltage doubler. The modulator has been implemented using the AMS CDS 0.35 μm CMOS technology and postlayout simulations have been performed. These simulations showed 14 bits of resolution with an oversampling ratio of 166
Keywords :
CMOS integrated circuits; differential amplifiers; low-power electronics; operational amplifiers; sigma-delta modulation; 0.35 micron; 1.1 V; 14 bit; 16 kHz; A/D conversion; AMS CDS CMOS technology; fully-differential CMOS operational amplifier; low-power sigma-delta modulator; oversampling ratio; postlayout simulations; resolution; very-low-voltage operation; voltage doubler; Capacitors; Clocks; Delta modulation; Delta-sigma modulation; Hysteresis; Jitter; Operational amplifiers; Performance gain; Sampling methods; Strontium;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921932
