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
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;
Conference_Titel :
Electronics, Circuits, and Systems (ICECS), 2010 17th IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-8155-2
DOI :
10.1109/ICECS.2010.5724604
