NDLI: A 0.5-V 90-dB SNDR 102 dB-SFDR audio-band continuous-time delta

Content Provider	Springer Nature Link
Author	Chen, Yan Pun, Kong Pang
Copyright Year	2011
Abstract	A 0.5-V high performance continuous-time one-bit delta–sigma modulator is reported for audio applications. High performance under this ultra-low supply is achieved by a feed-forward modulator architecture for reduced integrator swing, a special switched-capacitor-resistor feedback for less sensitivity to jitter noise, and a fast-settling fully differential amplifier. The synthesized modulator also has a high thermal-noise-limited SNR of 91 dB over a 20 kHz bandwidth. The 0.5-V fully-differential gate-input amplifier employs an adaptive common-mode feedback frequency compensation circuit, which leads to a robust modulator performance against process, supply voltage and temperature variations. Fabricated in a standard 0.13 μm CMOS process, the modulator achieves a spurious-free dynamic range (SFDR) of 101.9 dB and a signal-to-noise plus distortion ratio (SNDR) of 90 dB (A-weighted) over a 20-kHz signal bandwidth, with the latter being very close to the thermal noise limit. The modulator operates over a supply range from 0.4 to 0.75 V and a temperature range from −20 to 90°C.
Starting Page	159
Ending Page	169
Page Count	11
File Format	PDF
ISSN	09251030
Journal	Analog Integrated Circuits and Signal Processing
Volume Number	71
Issue Number	2
e-ISSN	15731979
Language	English
Publisher	Springer US
Publisher Date	2011-08-18
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Low-voltage circuit Low-voltage amplifier Continuous-time delta–sigma modulator Electrical Engineering Signal, Image and Speech Processing Circuits and Systems
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Signal Processing Hardware and Architecture

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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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