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Article
Extrapolating Analog-to-Digital Converter
Departmental Papers (ESE)
  • Zheng Yang, University of Pennsylvania
  • Jan Van der Spiegel, University of Pennsylvania
Document Type
Conference Paper
Date of this Version
8-1-2005
Comments
Copyright 2005 IEEE. Reprinted from Proceedings of the 48th IEEE Midwest Symposium on Circuits and Systems (MWSCAS 2005), August 2005, pages 847-850.
Publisher URL: http://dx.doi.org/10.1109/MWSCAS.2005.1594234

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Abstract

We propose a new type of oversampled analog-to-digital converter. It uses digital extrapolators to predict the analog signal before it is converted, and a coarse quantizer to convert the prediction error. Such converters are expected to have reduced complexity in their analog circuitry, thanks to the processing in the digital domain. General linear extrapolation algorithms are derived from the spline theory, and can be easily implemented using digital filters. Simulations show that the speed-resolution trade-off is 2 bits per octave with simple linear extrapolation. Noise-shaping can be added using a matched analog preemphasis filter, in which case the converter behaves similar to a delta-sigma modulator of the same order.

Keywords
  • oversampling,
  • extra-polating,
  • ADC,
  • spline
Citation Information
Zheng Yang and Jan Van der Spiegel. "Extrapolating Analog-to-Digital Converter" (2005)
Available at: http://works.bepress.com/jan_vanderspiegel/20/