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Improved Time-Base for Waveform Parameter Estimation

Published

Author(s)

Bryan C. Waltrip, Owen B. Laug, Gerard N. Stenbakken

Abstract

An improved gated oscillator time-base and associated auto-calibration algorithm for use in a high-accuracy waveform acquisition system are descrigbed. The time-base architecture consists of a stable 100 MHz gated oscillator, 24-bit counter chain, and a clock period interpolator. The nominal, uncorrected linearity of the time-base is approximately plus or minus 30 ps. By using an iterative, sine-fit based algorithm, the linearity has been improved to <5 ps. Details of the performance and major sources of error of the time-based and correction algorithm in an equivalent time sampling system are also discussed.
Citation
IEEE Transactions on Instrumentation and Measurement
Volume
50
Issue
4

Keywords

auto-calibration, comparator, counter, equivalent-time, oscillator, ramp, sampling, sine-fit, time-base

Citation

Waltrip, B. , Laug, O. and Stenbakken, G. (2001), Improved Time-Base for Waveform Parameter Estimation, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=12040 (Accessed July 24, 2024)

Issues

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Created August 30, 2001, Updated October 12, 2021