Digital compensation-based DAC output error correction method

By using quantum sensing technology and a multi-model collaborative correction mechanism, the dynamic correlation characteristics of DAC output error are analyzed, a digital compensation parameter matrix is ​​constructed, and multi-source error synchronous and accurate correction of DAC output signal is achieved. This solves the problem of limited correction effect in existing technologies and improves DAC output accuracy.

CN121461986AActive Publication Date: 2026-02-03IAG GROUP LIMITED
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Patent Information

Application Number
CN202610006926.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-05
Publication Date
2026-02-03
Estimated Expiration
2046-01-05

AI Technical Summary

Technical Problem

Existing DAC calibration methods fail to effectively integrate multi-dimensional error factors and cannot realize the dynamic correlation between operational amplifier offset, harmonic distortion, and differential nonlinearity errors. This leads to a decrease in correction effect when multiple source errors are superimposed. Furthermore, the lack of an integrated calibration platform and a multi-model collaborative correction mechanism makes it difficult to meet the stringent requirements of high-precision electronic systems for DAC output accuracy.

Method used

A calibration and analysis platform is constructed using quantum sensing technology. By using an operational amplifier offset dynamic coupling prediction model, a broadband DAC harmonic distortion correction model, and a differential nonlinear gradient correction model, the dynamic correlation characteristics of multi-dimensional errors are analyzed, a digital compensation parameter matrix is ​​constructed, and real-time digital modulation is used to correct errors.

Benefits of technology

It achieves synchronous and precise correction of multi-source errors, improves the amplitude, phase and timing accuracy of DAC output signals, and meets the stringent requirements of high-precision electronic systems.

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Abstract

The invention discloses a DAC output error correction method based on digital compensation, and the method comprises the steps: collecting the amplitude deviation, phase deviation and time sequence jitter data of a DAC output signal through a quantum sensing DAC calibration analysis platform, and constructing a multi-dimensional error original data set; calling an operational amplifier imbalance dynamic coupling prediction model to analyze a coupling relationship, and extracting dynamic association features; separating harmonic components and screening error contribution factors based on a broadband DAC harmonic distortion correction model; calculating a gradient change rule and an extreme point position by adopting a differential nonlinear gradient correction model; and integrating the characteristics and the parameters to construct a digital compensation parameter matrix, and dynamically adjusting an output code value through real-time digital modulation to realize error correction. According to the method, dynamic association and distribution characteristics of multi-source errors are accurately captured through multi-model collaborative operation and full-process closed-loop processing, multi-dimensional error synchronous correction is achieved, and DAC output precision and working condition adaptability are improved.
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