Title :
1 V all-MOS ΣΔ A/D converters in the log-domain
Author :
Serra-Graells, Francisco
Author_Institution :
Inst. de Microelectron. de Barcelona-CNM, Barcelona, Spain
Abstract :
This paper presents novel low-voltage all-MOS analog circuit techniques for the synthesis of oversampling ΣΔ A/D converters. The new approach exploits the possibilities of log-domain processing by using the MOSFET in subthreshold operation. Based on this strategy, a complete set of very low-voltage (down to 1 V) low-power (below 100 μW) all-MOS basic building blocks is proposed. As a result, oversampling ΣΔ A/D converters can be fully implemented in digital VLSI technologies for low-frequency (below 100 kHz) applications, like implantable sensors and hearing aids. Examples are given for a digital 0.35 μm CMOS VLSI process.
Keywords :
CMOS integrated circuits; VLSI; integrated circuit design; low-power electronics; sigma-delta modulation; ΣΔ A/D converters; 0.35 micron; 1 V; 100 kHz; 100 muW; CMOS VLSI process; LF applications; LV all-MOS analog circuit techniques; MOSFET subthreshold operation; digital VLSI technologies; implantable sensors; log-domain processing; low-frequency applications; low-power all-MOS basic building blocks; low-voltage analog circuit techniques; oversampling ΣΔ ADC; sigma-delta converters; Circuits; Differential equations; Dynamic range; Filters; Frequency; MOS devices; Process design; Proposals; Signal processing; Voltage;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Conference_Location :
Phoenix-Scottsdale, AZ
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010962
