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University of Toronto
1. Caldwell, Trevor. Delta-Sigma Modulators with Low Oversampling Ratios.
Degree: 2010, University of Toronto
This dissertation explores methods of reducing the oversampling ratio (OSR) of both delta-sigma modulators and incremental data converters. The first reduced-OSR architecture is the high-order cascaded delta-sigma modulator. These delta-sigma modulators are shown to reduce the in-band noise sufficiently at OSRs as low as 3 while providing power savings. The second low OSR architecture is the high-order cascaded incremental data converter which possesses signal-to-quantization noise ratio (SQNR) advantages over equivalent delta-sigma modulators at low OSRs. The final architecture is the time-interleaved incremental data converter where two designs are identified as potential methods of increasing the throughput of low OSR incremental data converters. A prototype chip is designed in 0.18um CMOS technology which can operate in three modes by simply changing the resetting clock phases. It can operate as an 8-stage pipeline analog-to-digital (A/D) converter, an 8th-order cascaded delta-sigma modulator, and an 8th-order cascaded incremental data converter with an OSR of 3.
PhDAdvisors/Committee Members: Johns, David A., Electrical and Computer Engineering.
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APA (6th Edition):
Caldwell, T. (2010). Delta-Sigma Modulators with Low Oversampling Ratios. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/26352
Chicago Manual of Style (16th Edition):
Caldwell, Trevor. “Delta-Sigma Modulators with Low Oversampling Ratios.” 2010. Doctoral Dissertation, University of Toronto. Accessed October 22, 2020. http://hdl.handle.net/1807/26352.
MLA Handbook (7th Edition):
Caldwell, Trevor. “Delta-Sigma Modulators with Low Oversampling Ratios.” 2010. Web. 22 Oct 2020.
Caldwell T. Delta-Sigma Modulators with Low Oversampling Ratios. [Internet] [Doctoral dissertation]. University of Toronto; 2010. [cited 2020 Oct 22]. Available from: http://hdl.handle.net/1807/26352.
Council of Science Editors:
Caldwell T. Delta-Sigma Modulators with Low Oversampling Ratios. [Doctoral Dissertation]. University of Toronto; 2010. Available from: http://hdl.handle.net/1807/26352