Overview
- A complete methodology for the digital calibration of analog circuits and systems is proposed
- Applications of the methodology in very different contexts are presented
- The methodology is based on sub-binary DACs that are versatile, occupy very
- low area and are extremely tolerant to mismatch
- Simulation techniques dedicated to the methodology are proposed
- The autozero and chopper techniques are compared and studied in detail (for operational amplifiers and more complex systems)
Part of the book series: The Springer International Series in Engineering and Computer Science (SECS, volume 870)
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Table of contents (7 chapters)
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Front Matter
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Back Matter
Keywords
About this book
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 alsocompensates drifts due to mechanical stresses and ageing.
Authors and Affiliations
Bibliographic Information
Book Title: Methodology for the Digital Calibration of Analog Circuits and Systems
Book Subtitle: with Case Studies
Authors: Marc Pastre, Maher Kayal
Series Title: The Springer International Series in Engineering and Computer Science
DOI: https://doi.org/10.1007/1-4020-4253-1
Publisher: Springer Dordrecht
eBook Packages: Engineering, Engineering (R0)
Copyright Information: Springer Science+Business Media B.V. 2006
Hardcover ISBN: 978-1-4020-4252-2Published: 06 December 2005
Softcover ISBN: 978-90-481-7087-6Published: 19 November 2010
eBook ISBN: 978-1-4020-4253-9Published: 17 January 2006
Series ISSN: 0893-3405
Edition Number: 1
Number of Pages: XVIII, 254
Topics: Circuits and Systems, Electrical Engineering, Electronics and Microelectronics, Instrumentation