DocumentCode
1964044
Title
A 1-1-1-1 MASH delta-sigma modulator using dynamic comparator-based OTAs
Author
Yamamoto, Kentaro ; Carusone, Anthony Chan
Author_Institution
Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada
fYear
2011
fDate
19-21 Sept. 2011
Firstpage
1
Lastpage
4
Abstract
A 1-1-1-1 MASH delta-sigma modulator with dynamic comparator-based OTAs as replacements for conventional OTAs is presented. The proposed OTA asynchronously alternates between input comparison and current pulse injection under digital control. The 65-nm LP CMOS prototype achieves a FoM of 276 fJ/conv-step with 70.4 dB SNDR over a 2.5-MHz bandwidth while consuming 3.73 mW from a 1.2-V supply.
Keywords
CMOS integrated circuits; comparators (circuits); delta-sigma modulation; digital control; operational amplifiers; 1-1-1-1 MASH delta-sigma modulator; LP CMOS prototype; OTA; bandwidth 2.5 MHz; current pulse injection; digital control; dynamic comparator; power 3.73 mW; size 65 nm; voltage 1.2 V; Bandwidth; CMOS integrated circuits; Capacitors; Latches; Modulation; Multi-stage noise shaping; Power measurement;
fLanguage
English
Publisher
ieee
Conference_Titel
Custom Integrated Circuits Conference (CICC), 2011 IEEE
Conference_Location
San Jose, CA
ISSN
0886-5930
Print_ISBN
978-1-4577-0222-8
Type
conf
DOI
10.1109/CICC.2011.6055288
Filename
6055288
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