A Novel Sigma-Delta Modulator with Fractional-Order Digital Loop Integrator
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-31
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
This paper proposes using a fractional-order digital loop integrator to improve the robust stability of Sigma-Delta modulator, thus extending the integer-order Sigma-Delta modulator to a non-integer-order (fractional-order) one in the Sigma-Delta ADC design field.
The proposed fractional-order Sigma-Delta modulator has reasonable noise characteristics, dynamic range, and bandwidth; moreover the signal-to-noise ratio (SNR) is improved remarkably.
In particular, a 2nd-order digital loop integrator and a digital PIλDμ controller are combined to work as the fractional-order digital loop integrator, which is realized using FPGA; this will reduce the ASIC analog circuit layout design and chip testing difficulties.
The parameters of the proposed fractional-order Sigma-Delta modulator are tuned by using swarm intelligent algorithm, which offers opportunity to simplify the process of tuning parameters and further improve the noise performance.
Simulation results are given and they demonstrate the efficiency of the proposed fractional-order Sigma-Delta modulator.
American Psychological Association (APA)
Xu, Chi& Jin, Yu& Yu, Duli. 2017. A Novel Sigma-Delta Modulator with Fractional-Order Digital Loop Integrator. Mathematical Problems in Engineering،Vol. 2017, no. 2017, pp.1-7.
https://search.emarefa.net/detail/BIM-1192833
Modern Language Association (MLA)
Xu, Chi…[et al.]. A Novel Sigma-Delta Modulator with Fractional-Order Digital Loop Integrator. Mathematical Problems in Engineering No. 2017 (2017), pp.1-7.
https://search.emarefa.net/detail/BIM-1192833
American Medical Association (AMA)
Xu, Chi& Jin, Yu& Yu, Duli. A Novel Sigma-Delta Modulator with Fractional-Order Digital Loop Integrator. Mathematical Problems in Engineering. 2017. Vol. 2017, no. 2017, pp.1-7.
https://search.emarefa.net/detail/BIM-1192833
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1192833