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Archive for April, 2011

My PhD is officially complete. The final doctoral defense took place today and I can thankfully say that I passed with flying colors. The dissertation is titled Tunable Mismatch Shaping for Bandpass Delta-Sigma Data Converters. I’m looking forward to a long summer of rest, particularly after the intensity of the past several months.

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The final doctoral defense for my PhD has been scheduled for 1 PM on April 20, 2011, taking place in ACE 2.404B on-campus at the University of Texas. My dissertation is titled Tunable Mismatch Shaping for Bandpass Delta-Sigma Data Converters.

From the abstract:

Oversampled digital-to-analog converters typically employ an array of unit elements to drive out the analog signal. Manufacturing defects can create errors due to mismatch between the unit elements, leading to a sharp reduction in the effective dynamic range through the converter. Mismatch noise shaping is an established technique for alleviating these effects, but usually anchors the signal band to a fixed frequency location. In order to extend these advantages to tunable applications, this work explores a series of techniques that allow the suppression band of the mismatch noise shaping function to have an adjustable center frequency. The proposed techniques are implemented in hardware and evaluated according to mismatch shaping performance, latency and hardware complexity.

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