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Nonrandom quantization errors in timebases

delete2001-01-01
delete4
PRE
AI
刘
刘东 (Dong Liu)
J
Janusz A. Starzyk
B
B.C. Waltrip
DOI:10.1109/19.948294delete
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Abstract

Abstract

En 中文
Timebase distortion causes nonlinear distortion of waveforms measured by sampling instruments. When such instruments are used to measure the rms amplitude of the sampled waveforms, such distortions result in errors in the measured root-mean squared (rms) values. This paper looks at the nature of the errors that result from nonrandom quantization errors in an instrument's timebase circuit. Simulations and measurements on a sampling voltmeter show that the errors in measured rms amplitude have a nonnormal probability distribution, such that the probability of large errors is much greater than would be expected from the usual quantization noise model. A novel timebase compensation method is proposed which makes the measured rms errors normally distributed and reduces their standard deviation by a factor of 25. This compensation method was applied to a sampling voltmeter and the improved accuracy was realized.
Keywords:
compensation
correction algorithm
quantization
sampling
timebase
voltmeter
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Journal

IEEE Transactions on Instrumentation and Measurement cover
IEEE Transactions on Instrumentation and Measurement
IF:
5.9
Papers:
2.0W
Citations:
5.8W

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