NDLI: An Over-60dB True Rail-to-Rail Performance Using Correlated Level Shifting and an Opamp with 30dB Loop Gain

Content Provider	IEEE Xplore Digital Library
Author	Gregoire, B.R. Un-Ku Moon
Copyright Year	2008
Description	Author affiliation: Oregon State Univ., Corvallis, OR (Gregoire, B.R.; Un-Ku Moon)
Abstract	This work introduces correlated level shifting (CLS) that simultaneously decreases the error due to finite opamp gain and allows true rail-to-rail operation. An extra phase is needed, but, surprisingly, there is no speed penalty when compared to a high-gain opamp solution because CLS does not require full settling during the next-to-last phase. In fact, the increased signal swing means that the same SNR can be achieved using smaller sampling capacitors. Thus, it could be argued that CLS can provide accurate results at a higher speed than using a traditional 2-phase operation with a high-gain opamp. For example, with CLS, the performance is maintained over the whole 0.9V supply, whereas a standard configuration has only a 0.6V swing. Thus, the standard configuration requires 2.25x larger sampling capacitors to achieve the same signal to kT/C noise ratio.
Starting Page	540
Ending Page	634
File Size	936533
Page Count	95
File Format	PDF
ISBN	9781424420100
DOI	10.1109/ISSCC.2008.4523296
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-02-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance gain Rails Sampling methods Capacitors Phase estimation Semiconductor device noise Signal to noise ratio Voltage Distortion measurement Solid state circuits
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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