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An improved gated oscillator time-base and associated auto-calibration algorithm for use in a high-accuracy sampling waveform acquisition system are described. 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 ±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-base and correction algorithm in an equivalent time sampling system are also discussed
Published in:
Instrumentation and Measurement, IEEE Transactions on
(Volume:50
,
Issue:
4
)
Date of Publication: Aug 2001
- Page(s):
- 981 - 985
- ISSN :
- 0018-9456
- INSPEC Accession Number:
- 7059352
- Digital Object Identifier :
- 10.1109/19.948311
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 07 August 2002
- Issue Date :
- Aug 2001
- Sponsored by :
- IEEE Instrumentation and Measurement Society
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