In this thesis, a novel Direct-Charge-Transfer (DCT) integrator structure is
proposed, which can settle much faster than regular switch-capacitor integrators. A
new Spread-Spectrum Dynamic Element Matching (SS-DEM) algorithm is also
introduced, which can effectively spread or shape the nonlinearity error of multi-bit
DAC in the feedback path, thus improve the SNDR and THD performance of overall
delta-sigma modulators. A three-bit quantizer design example is presented, which is
embedded in a MASH2-0 structure delta-sigma modulator prototype and has been
fabricated in AMI CMOS 1.5μm technology. Testing results indicate this quantizer
works well. / Graduation date: 2004
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/30047 |
| Date | 09 January 2004 |
| Creators | Guo, Yuhua |
| Contributors | Temes, Gabor C. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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