Adaptive reference levels in a level-crossing analog-to-digital converter

Andrew C. Singer, Karen M. Guan, Suleyman S. Kozat

Research output: Contribution to journalArticlepeer-review


Level-crossing analog-to-digital converters (LC ADCs) have been considered in the literature and have been shown to efficiently sample certain classes of signals. One important aspect of their implementation is the placement of reference levels in the converter. The levels need to be appropriately located within the input dynamic range, in order to obtain samples efficiently. In this paper, we study optimization of the performance of such an LC ADC by providing several sequential algorithms that adaptively update the ADC reference levels. The accompanying performance analysis and simulation results show that as the signal length grows, the performance of the sequential algorithms asymptotically approaches that of the best choice that could only have been chosen in hindsight within a family of possible schemes.

Original languageEnglish (US)
Article number513706
JournalEurasip Journal on Advances in Signal Processing
StatePublished - 2008

ASJC Scopus subject areas

  • Signal Processing
  • Information Systems
  • Hardware and Architecture
  • Electrical and Electronic Engineering

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