Archive for October, 2008

The proposal went great! I’m now officially a PhD candidate. Embarking on a journey countless others have undertaken, I now begin a tireless battle to push to the end (and not necessarily the logical conclusion) through the setbacks, the self-indulgence and self-restraint, the lapses of discipline and manic exertions thereof, and all the while squirming through the ever-tightening grip of despair in hopes of feeling the dizzying heights of discovery.

Challenge accepted!

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The proposal for my PhD qualification has been scheduled for 8:30 AM on October 14, 2008, taking place in ACE 3.408 on-campus at the University of Texas. The dissertation is tentatively titled Tunable N-Path Mismatch Shaping for Bandpass Delta-Sigma Modulators.

From the abstract:

In a unit-element digital-to-analog converter (DAC) used within a Delta-Sigma converter, mismatch noise can sharply reduce the achievable signal-to-noise ratio (SNR). Mismatch noise-shaping is an established technique for spectrally shaping the noise power created by mismatch-error in order for most of it to fall outside the signal band. This is done by dynamically re-arranging the order in which quantizer unit-elements are utilized. This research proposes a mismatch noise-shaping technique that allows the center frequency of the mismatch noise transfer function to follow the center frequency of a tunable bandpass Delta-Sigma modulator.

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