METHODOLOGY FOR THE DIGITAL CALIBRATION OF ANALOG CIRCUITS AND SYSTEMS

  • Marc Pastre
  • Maher Kayal
Book

Part of the The International Series in Engineering and Computer Science book series (SECS, volume 870)

Table of contents

  1. Front Matter
    Pages I-XVIII
  2. Marc Pastre, Maher Kayal
    Pages 1-4
  3. Marc Pastre, Maher Kayal
    Pages 5-22
  4. Marc Pastre, Maher Kayal
    Pages 151-197
  5. Marc Pastre, Maher Kayal
    Pages 241-243
  6. Back Matter
    Pages 245-257

About this book

Introduction

Methodology for the Digital Calibration of Analog Circuits and Systems shows how to relax the extreme design constraints in analog circuits, allowing the realization of high-precision systems even with low-performance components. A complete methodology is proposed, and three applications are detailed.

To start with, an in-depth analysis of existing compensation techniques for analog circuit imperfections is carried out. The M/2+M sub-binary digital-to-analog converter is thoroughly studied, and the use of this very low-area circuit in conjunction with a successive approximations algorithm for digital compensation is described. A complete methodology based on this compensation circuit and algorithm is then proposed. The detection and correction of analog circuit imperfections is studied, and a simulation tool allowing the transparent simulation of analog circuits with automatic compensation blocks is introduced.

The first application shows how the sub-binary M/2+M structure can be employed as a conventional digital-to-analog converter if two calibration and radix conversion algorithms are implemented.

The second application, a SOI 1T DRAM, is then presented. A digital algorithm chooses a suitable reference value that compensates several circuit imperfections together, from the sense amplifier offset to the dispersion of the memory read currents.

The third application is the calibration of the sensitivity of a current measurement microsystem based on a Hall magnetic field sensor. Using a variant of the chopper modulation, the spinning current technique, combined with a second modulation of a reference signal, the sensitivity of the complete system is continuously measured without interrupting normal operation. A thermal drift lower than 50 ppm/°C is achieved, which is 6 to 10 times less than in state-of-the-art implementations. Furthermore, the calibration technique also compensates drifts due to mechanical stresses and ageing.

Keywords

Analog Circuits and Systems DRAM Hall sensors Mixed-mode circuit design Offset Cancellation (Chopper/Autozero) RAM SECS Sub-binary DACs Transistor

Authors and affiliations

  • Marc Pastre
    • 1
  • Maher Kayal
    • 2
  1. 1.Ecole Polytechnique Fédérale de LausanneSwitzerland
  2. 2.Ecole Polytechnique Fédérale de LausanneSwitzerland

Bibliographic information

  • DOI https://doi.org/10.1007/1-4020-4253-1
  • Copyright Information Springer 2006
  • Publisher Name Springer, Dordrecht
  • eBook Packages Engineering
  • Print ISBN 978-1-4020-4252-2
  • Online ISBN 978-1-4020-4253-9
  • Series Print ISSN 0893-3405
  • About this book