Gain Calibration Technique for Increased Resolution in FRC Data Converters

Frank R. Dropps, Ramesh Harjani

Research output: Contribution to journalArticlepeer-review

Abstract

A feedforward residue compensation (FRC) data converter combines the benefits of a Nyquist rate analog-to-digital converter (ADC) with an oversampled converter. In this brief, the authors introduce a digital calibration technique that allows the FRC architecture to provide high resolution at high input signal frequencies. A high-performance pipeline ADC is used as an auxiliary converter to measure the quantization effects of an oversampled primary converter in the FRC architecture. A practical ADC architecture using a digital gain error calibration technique produces a 15-bit 70-Msample/s converter with greater than 100-dB spurious-free dynamic range. Simulation results are used to validate the architecture and gain calibration technique.

Original languageEnglish (US)
Pages (from-to)1200-1204
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume53
Issue number11
DOIs
StatePublished - Nov 2006

Keywords

  • Analog-to-digital converter (ADC)
  • Nyquist rate converters
  • feedforward residue compensation (FRC)
  • gain error correction
  • oversampled converters
  • sigma–delta

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