A continuous-time multi-stage noise-shaping delta-sigma modulator for next generation wireless applications
Name
927438425-MIT.pdf
Description
Full printable version
Size
16.46 MB
Format
Adobe PDF
Checksum (MD5)
0210e4be27ed1fd0b33b6f99655dcf9a
Author(s)
Yoon, Do Yeon
Advisor(s)
Hae-Seung Lee.
Date Issued
2015
Publisher
Massachusetts Institute of Technology
Abstract
A continuous-time (CT) delta-sigma ([delta][sigma]) modulator for modern wireless communication applications is investigated in this thesis. Quantization noise is suppressed aggressively by increasing the effective order of the noise transfer function (NTF). In order to increase the effective order of the NTF, a 2-loop sturdy multi-stage noise-shaping (SMASH) architecture is utilized. The proposed CT SMASH architecture has a much wider signal bandwidth which was limited in the discrete-time (DT) SMASH architecture due to the inherent sampling frequency limitation of the DT implementation. Furthermore, the proposed CT SMASH architecture provides a better quantization noise suppression capability than the DT SMASH architecture by more completely canceling the quantization noise from the first loop. The CT SMASH architecture is implemented with several circuit techniques suitable for high operation speed. These circuit techniques allow the proposed CT [delta][sigma] modulator to achieve wide bandwidth, high resolution, and low power consumption for modern wireless communication applications. As a result, the prototype fabricated in 28nm CMOS achieves DR of 85dB, peak SNDR of 74.9dB, SFDR of 89.3dBc and Schreier FOM of 172.9dB over a 50MHz bandwidth at a 1.8GHz sampling frequency.
Description
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 115-121).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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