DocumentCode
2667266
Title
A two op-amps third-order ΣΔ modulator with complex conjugate NTF zeros
Author
Perez, Aldo Peria ; Belotti, Oscar ; Bonizzoni, Edoardo ; Maloberti, Franco
Author_Institution
Dept. of Electron., Univ. of Pavia, Pavia, Italy
fYear
2010
fDate
12-15 Dec. 2010
Firstpage
683
Lastpage
686
Abstract
This paper presents a third-order Sigma-Delta modulator that uses only two operational amplifiers. A fully digital solution reduces both amplifiers output swings. This design achieves complex conjugate zeros that allows obtaining a signal-to-noise ratio of about 8 dB better than having all the zeros placed at z = 1. Behavioral level simulations demonstrate the effectiveness of the approach.
Keywords
integrated circuit design; operational amplifiers; sigma-delta modulation; behavioral level simulations; complex conjugate NTF zeros; op-amp third-order ΣΔ modulator; sigma-delta modulator design; signal-to-noise ratio; Image resolution; Analog-to-Digital conversion; Operational amplifier output swing reduction; Sigma-Delta modulation;
fLanguage
English
Publisher
ieee
Conference_Titel
Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on
Conference_Location
Athens
Print_ISBN
978-1-4244-8155-2
Type
conf
DOI
10.1109/ICECS.2010.5724604
Filename
5724604
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