NDLI: Tunable mismatch shaping for quadrature bandpass delta-sigma data converters

Content Provider	IEEE Xplore Digital Library
Author	Akram, W. Swartzlander, E.E.
Copyright Year	2010
Description	Author affiliation: Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78712-0240 (Akram, W.; Swartzlander, E.E.)
Abstract	Quadrature bandpass delta-sigma data converters are widely used in low-IF receiver applications where high linearity is required over a narrow bandwidth. A quadrature delta-sigma modulator with multibit quantization requires a digital-to-analog converter (DAC) for each of the in-phase (I) and quadrature (Q) paths. Device mismatch errors in the DAC can seriously degrade overall converter performance by adding I/Q path-mismatch and distortion. Mismatch noise shaping is an established technique for overcoming these limitations in a complex DAC, but usually anchors the signal band to a fixed frequency location. In order to apply mismatch shaping to applications that require tunable signal band locations, this paper presents a technique that allows the center frequency of the mismatch noise shaping transfer function through the complex DAC to be adjustable over the entire Nyquist range.
Starting Page	198
Ending Page	203
File Size	621328
Page Count	6
File Format	PDF
ISBN	9781424489329
ISSN	15206130
e-ISBN	9781424489336
e-ISBN	9781424489343
DOI	10.1109/SIPS.2010.5624787
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Tuning Signal to noise ratio Frequency modulation Noise shaping Bandpass Quadrature Delta-Sigma N-Path DWA Mismatch-Shaping Complex
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
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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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