Modeling the impact of technological process variations on R-2R DAC static characteristics

Digital-to-analog converter (DAC) is widely used in modern integrated electronics, converting digital signals into analog ones. This paper considers an R-2R structure DAC, its operation principle and static characteristics: integral non-linearity (INL) and differential non-linearity (DNL). For the a...

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Published in:St. Petersburg State Polytechnical University Journal. Computer Science. Telecommunications and Control Systems Vol. 13; no. 3; p. 55
Main Authors: Salonina, Ekaterina A, Belyaev, Yakov V, Piatak, Ivan M
Format: Journal Article
Language:English
Russian
Published: Saint Petersburg Peter the Great St. Petersburg State Polytechnical University 01.01.2020
Subjects:
Centroids
Circuits
Digital to analog conversion
Digital to analog converters
Linearity
Matlab
Modelling
Nonlinearity
Static characteristics
Systematic errors
Transfer functions
ISSN:2304-9766
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Abstract Digital-to-analog converter (DAC) is widely used in modern integrated electronics, converting digital signals into analog ones. This paper considers an R-2R structure DAC, its operation principle and static characteristics: integral non-linearity (INL) and differential non-linearity (DNL). For the accuracy of this DAC conversion, it is important that the element resistance ratio is maintained for the entire circuit. The authors considered the influence of random and systematic errors of DAC elements resistances on the transfer function and static characteristics of DAC, as well as the use of special DAC element placements to compensate for systematic errors. Systematic errors are presented as three types of gradients: linear, quadratic and central quadratic. These gradients were modeled in MATLAB. Using the MATLAB script, the authors calculated the static characteristics of the R-2R DAC for two resistor placements: regular and common centroid, taking into account the impact of three different gradients. These placements were compared based on the modeling and calculation results.
AbstractList Digital-to-analog converter (DAC) is widely used in modern integrated electronics, converting digital signals into analog ones. This paper considers an R-2R structure DAC, its operation principle and static characteristics: integral non-linearity (INL) and differential non-linearity (DNL). For the accuracy of this DAC conversion, it is important that the element resistance ratio is maintained for the entire circuit. The authors considered the influence of random and systematic errors of DAC elements resistances on the transfer function and static characteristics of DAC, as well as the use of special DAC element placements to compensate for systematic errors. Systematic errors are presented as three types of gradients: linear, quadratic and central quadratic. These gradients were modeled in MATLAB. Using the MATLAB script, the authors calculated the static characteristics of the R-2R DAC for two resistor placements: regular and common centroid, taking into account the impact of three different gradients. These placements were compared based on the modeling and calculation results.
Author Piatak, Ivan M
Salonina, Ekaterina A
Belyaev, Yakov V
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SubjectTerms Centroids
Circuits
Digital to analog conversion
Digital to analog converters
Linearity
Matlab
Modelling
Nonlinearity
Static characteristics
Systematic errors
Transfer functions
Title Modeling the impact of technological process variations on R-2R DAC static characteristics
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