FRC: A method for extending the resolution of nyquist rate converters using oversampling

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Abstract

Nyquist rate converters have traditionally been used for low to moderate resolution data acquisition applications. In this paper, we describe a feedforward residue compensation (FRC) technique to extend the resolution of such converters using an oversampling modulator loop. Closed-form analytical expressions are developed to provide insight into the operation and limits on the resolution of such converters. Simulation results are used to verify the operation and confirm the limitations of this technique.

Original languageEnglish (US)
Pages (from-to)482-494
Number of pages13
JournalIEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
Volume45
Issue number4
DOIs
StatePublished - 1998

Keywords

  • High resolution
  • Nyguist rate converters
  • Oversampled converters
  • Residue compensation
  • Sigma-delta

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