Further Investigation for Piecewise Sampling to Overcome Transient Effect of Staircase Waveform

A further investigation of the new approach to overcome the transient effect of staircase waveform is reported. The piecewise sampling is reviewed, in which a normal sampling is performed but the discrete Fourier transform is only applied to partial samples while the other samples located on both si...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2017-06, Vol.66 (6), p.1217-1226
Main Authors: Zuliang Lu, Yan Yang, Lu Huang, Lei Wang, Xianlin Pan, Jiangtao Zhang, So, Eddy
Format: Article
Language:English
Subjects:
Analog to digital conversion
Analog to digital converters
Differential measurement
Digital to analog conversion
Digital to analog converters
digital-analog conversion
Discrete Fourier transforms
Error analysis
Error detection
Fourier transforms
Nickel
Sampling
staircase waveform
Transient analysis
transient effect
Voltage measurement
Voltmeters
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Summary:A further investigation of the new approach to overcome the transient effect of staircase waveform is reported. The piecewise sampling is reviewed, in which a normal sampling is performed but the discrete Fourier transform is only applied to partial samples while the other samples located on both sides of each step are discarded. The applicability of the analog-to-digital converter (ADC) with antialiasing filter is verified through comparison with another ADC without such filter. The parameter settings of the step number in one period, the number of samples at each step, and the frequency of the staircase waveform are investigated with the experimental results. An experimental approach is introduced to determine the location and length of the desired piecewise sampling. The available frequency of staircase waveform is limited by the settling time of digital-to-analog converter (DAC). For higher frequency measurements, the well-known multiperiod strategy previously applied in ADC is proposed to have its application extended into DAC. From another perspective, it will widen the width of the step and alleviate the need for frequent conversions. The relevant principles, procedures and experimental evidences are presented. The experimental results indicate that no significant additional measurement error is detected.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2017.2668760