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摘要:In this paper,a multi-parameter high resolution ADC digital background calibration method based on traction particle swarm optimization(TPSO) is proposed.In this method,the traditional particle swarm optimization(PSO) is improved to make the algorithm more suitable for the application of hardware circuits,and the accurate calibration of high resolution ADC is realized.Different from traditional ADC calibration algorithms,which can only compensate for one error,this algorithm can simultaneously calibrate multiple errors,such as time jitter,comparator offset,capacitance mismatch,operational amplifier nonlinearity,etc.Firstly,this algorithm deeply analyzes the causes and ways of ADC errors with different architectures.Then,ADC models with different architectures and resolutions are built and error injection is performed on them.Finally,The PSO algorithm is used to calibrate Flash ADC.For the hardware characteristics of Pipeline ADC,the TPSO algorithm is proposed to achieve high performance calibration.This paper modeled 3-bit Flash ADC,5-bit Flash ADC,and 14-bit pipeline ADC and used the algorithm proposed in this paper to calibrate them respectively.Specifically,the SNDR is improved from 18.65 dB to 26.90 dB in the 5-bit flash ADC case.Similarly,in the 14-bit pipeline ADC case,the SNDR is improved from 52.60 dB to 81.7 dB and the SFDR is improved from 69.80 dB to 97.83 dB.Moreover,these calibrations are finished with less than 100,000 sampling points.Therefore,the experimental results show that the proposed method not only has good robustness and accurate calibration performance but also has a fast convergence rate.
会议名称:

2021 2nd International Conference on Electronics, Communications and Information Technology (CECIT 2021)

会议时间:

2021-12-27

会议地点:

中国海南三亚

  • 专辑:

    信息科技

  • 专题:

    无线电电子学; 自动化技术

  • DOI:

    10.26914/c.cnkihy.2021.065599

  • 分类号:

    TN792;TP18

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