Publications [#287156] of Ingrid Daubechies

Papers Published

1. Daubechies, I; DeVore, R; Güntürk, CS; Vaishampayan, VA, Beta expansions: A new approach to digitally corrected A/D conversion, Proceedings - IEEE International Symposium on Circuits and Systems, vol. 2 (January, 2002), pp. 784-787, IEEE
   (last updated on 2024/11/08)

   Abstract:
   We introduce a new architecture for pipelined (and also algorithmic) A/D converters that give exponentially accurate conversion using inaccurate comparators. An error analysis of a sigma-delta converter with an imperfect comparator and a constant input reveals a self-correction property that is not inherited by the successive refinement quantization algorithm that underlies both pipelined multistage A/D converters as well as algorithmic A/D converters. Motivated by this example, we introduce a new A/D converter- the Beta Converter-which has the same self-correction property as a sigma-delta converter but which exhibits higher order (exponential) accuracy with respect to the bit rate as compared to a sigma-delta converter, which exhibits only polynomial accuracy.