On Improving Accuracy of the Resistor Strings Based on a New Design Technique

Abstract

This paper presents a new approach on one of the difficult domains between the boundaries of electronics and physics which is demanded in high-resolution applications such as DACs and ADCs. In the proposed differential architecture, a novel combination of two strings of resistors is employed to improve all possible random and gradient errors in a single resistor string. A proper design and construction of a resistor string structure leads to an effective improvement in the linearity behavior of resistor string digital to analog and analog to digital converters. The proposed differential structure is simulated in 0.18 µm CMOS technology as a proof of concept. Moreover, the statistical investigation of the new structure is carried out by using the MATLAB. HSPICE results as well as statistical investigations show the accuracy improvement of the resistor string for about two bits in comparison with a single conventional resistor string. Therefore, more precise reference voltages required in high accuracy applications can be provided by the presented technique.

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Correspondence to Abdollah Amini.

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Amini, A., Hassanzadazar, M. & Baradaranrezaeii, A. On Improving Accuracy of the Resistor Strings Based on a New Design Technique. Iran J Sci Technol Trans Electr Eng (2020). https://doi.org/10.1007/s40998-020-00354-0

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Keywords

  • Resistor string
  • Random and gradient errors
  • High resolution