Improved time-base for waveform parameter estimation

被引：3
|
作者：
Waltrip, BC [1 ]
Laug, OB [1 ]
Stenbakken, GN [1 ]
机构：
[1] US Dept Commerce, NIST, Div Elect, Elect & Elect Engn Lab, Gaithersburg, MD 20899 USA
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2001年 / 50卷 / 04期
关键词：
auto-calibration algorithm; equivalent-time sampling; gated oscillator; time-base;
D O I：
10.1109/19.948311
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
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页码：981 / 985
页数：5
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