Title :
Incremental Delta-Sigma Structures for DC Measurement: an Overview
Author :
Márkus, János ; Deval, Philippe ; Quiquempoix, Vincent ; Silva, José ; Temes, Gabor C.
Author_Institution :
Dept. of Meas. & Inf. Syst., Budapest Univ. of Technol. & Econ.
Abstract :
In this paper the theoretical operation of incremental (charge-balancing) delta-sigma (DeltaSigma) converters is reviewed, and the implementation of a 22-bit incremental A/D converter is described. Two different analyses of the first-order incremental converter are presented, and based on these results two extensions to higher-order modulators are proposed. Since line-frequency noise suppression is often important in measurement applications, modulators followed by sinck filters are also analyzed. Equations are derived for the estimation of the required number of cycles for a given resolution and architecture. Finally, the design and implementation of a third-order incremental converter with a fourth-order sine filter is briefly discussed
Keywords :
delta-sigma modulation; 22 bit; DC measurement; delta-sigma converters; delta-sigma structures; first-order incremental converter; higher-order modulators; incremental A/D converter; incremental charge-balancing converters; line-frequency noise suppression; sinck filters; Analog-digital conversion; CMOS technology; Counting circuits; Equations; Filters; Noise measurement; Noise shaping; Output feedback; Signal resolution; USA Councils;
Conference_Titel :
Custom Integrated Circuits Conference, 2006. CICC '06. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
1-4244-0075-9
Electronic_ISBN :
1-4244-0076-7
DOI :
10.1109/CICC.2006.320960
