DocumentCode
3359147
Title
74dB SNDR multi-loop sturdy-MASH delta-sigma modulator using 35dB opamp gain
Author
Maghari, Nima ; Kwon, Sunwoo ; Moon, Un-Ku
Author_Institution
Sch. of EECS, Oregon State Univ., Corvallis, OR
fYear
2008
fDate
21-24 Sept. 2008
Firstpage
101
Lastpage
104
Abstract
In this paper a new multi-loop delta-sigma modulator is presented. This multi-loop modulator is insensitive to low gain opamps while maintaining the stability advantage. As a proof of concept, a prototype was implemented to show the functionality of this structure. Measurement results shows that with open-loop opamp gain of only 35 dB, this prototype achieves over 74 dB SNDR at oversampling ratio of 16. The sampling frequency is 20 MHz and the total power dissipation is 3.2 mW from a 1.2 V power supply.
Keywords
delta-sigma modulation; modulators; MASH delta-sigma modulator; SNDR; gain 35 dB; multiloop delta-sigma modulator; open-loop opamp gain; power 3.2 mW; voltage 1.2 V; Bandwidth; Circuits; Delta modulation; Filters; Multi-stage noise shaping; Noise shaping; Power dissipation; Prototypes; Stability; Transfer functions;
fLanguage
English
Publisher
ieee
Conference_Titel
Custom Integrated Circuits Conference, 2008. CICC 2008. IEEE
Conference_Location
San Jose, CA
Print_ISBN
978-1-4244-2018-6
Electronic_ISBN
978-1-4244-2019-3
Type
conf
DOI
10.1109/CICC.2008.4672031
Filename
4672031
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