DocumentCode
49615
Title
Noise-shaping SAR ADC using three capacitors
Author
Chen, Chun-Hung ; Zhang, Ye ; Ceballos, Jose Luis ; Temes, Gabor C.
Author_Institution
Sch. of Electr. Eng. & Comput. Sci., Oregon State Univ., Corvallis, OR, USA
Volume
49
Issue
3
fYear
2013
fDate
Jan. 31 2013
Firstpage
182
Lastpage
184
Abstract
A simple and highly efficient successive-approximation registers (SAR) ADC realisation is proposed. It requires an opamp, a comparator and only three equal-valued capacitors. The proposed scheme is insensitive to the capacitor parasitics, and has a small capacitance spread. With an oversampled scheme, it also allows noise-shaping the remaining quantisation error. It is well-suited for low-frequency instrumentation and measurement applications, and for use in extended-counting ADCs.
Keywords
analogue-digital conversion; approximation theory; capacitors; comparators (circuits); operational amplifiers; capacitor parasitics; comparator; equal-valued capacitor; extended-counting ADC; low-frequency instrumentation; low-frequency measurement; noise-shaping SAR ADC; opamp; quantisation error; successive-approximation register ADC realisation;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2012.4204
Filename
6457558
Link To Document