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Oscillator Instability Effects in Time Interval Measurement
IEEE Transactions on Circuits and Systems I: Regular Papers, 2013State-of-the-art TDCs can have a precision close to one picosecond, for which reason clock instability is starting to be one of the most significant factor limiting the precision. This paper provides methods to estimate clock jitter induced error by phase noise PSD measurements.
Keränen Pekka, Kostamovaara Juha Tapio
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Short Interval Time Measurement by a Parasitoid Wasp
Science, 1987The number of eggs laid by the parasitoid wasp Trichogramma varies with host volume. The duration of the wasp's initial transit across the host surface during host examination is used to determine the number of eggs laid.
J M, Schmidt, J J, Smith
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A Vernier Time-Interval Measurer on a PLIC
Instruments and Experimental Techniques, 2004A vernier time-interval measurer with a computed interpolation coefficient, based on an XCS05XL PLIC from the XILINX company, is described. The resolving power of the measurer is 0.625–0.25 ns with a 20- to 50-interpolation coefficient and a 80-MHz reference signal.
E. I. Gurin +4 more
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Absorbance determination by time interval measurements
Analytical Chemistry, 1980Absorbance measurements are accomplished by placing the sample inside the cavity of a laser which is impulsively pumped. If the laser contains an appropriate gain medium, there will exist a measurable time delay between pumping and the onset of lasing. It is shown that this time delay is related to the optical losses in the laser cavity. Increased time
J. Michael. Ramsey, William B. Whitten
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Systolic Time Intervals and New Measurement Methods
Cardiovascular Engineering and Technology, 2016Systolic time intervals have been used to detect and quantify the directional changes of left ventricular function. New methods of recording these cardiac timings, which are less cumbersome, have been recently developed and this has created a renewed interest and novel applications for these cardiac timings.
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Time Interval Measurement in the Picosecond Accuracy
Instruments and Experimental Techniques, 2019A model and a laboratory method were developed for determining the major systematic errors affecting time interval measurement (TIM) accuracy. The laboratory method investigates the optimum trigger level for the high slew rate timing pulses that achieves the highest TIM accuracy. The overall errors due to the measurement setup and the trigger level, at
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Real-time QT interval measurement
Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (Cat. No.00CH37143), 2002A real-time QT interval measurement algorithm was developed and preliminary tested. Three ECG leads (I, II and V5) were digitized simultaneously at a rate of 500 samples by second during five minutes; twenty patients were studied. The resulting signal was filtered in order to reject noise and avoid baseline wander.
R. Gonzalez +2 more
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A precision clock for measuring time intervals
Nuclear Instruments and Methods, 1960Abstract A precision electronic clock which uses 10 Mc pulses to measure time intervals is described. The linearity and the average channel width of the system were determined by measuring time intervals between randomly distributed pulses. In these tests about 250 000 counts per channel were accumulated showing that the system was linear.
R.W. Findley +2 more
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Devices for measurement of frequency and intervals of time
Proceedings of LFNM 2005. 7th International Conference on Laser and Fiber-Optical Networks Modeling, 2005., 2005The basic characteristics and block diagrams of some digital electronic frequency meters are considered. These frequency meters provide an opportunity to make exact measurement of the frequency in the range from 0.005 Hz up to 300 GHz to measure time intervals up to 1 ...
A. Marienko +4 more
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Bridge for Measuring Small Time Intervals
Bell System Technical Journal, 1928A bridge circuit fur measuring time intervals from about one ten-thousandths of a second up to several seconds is described and its operation explained. The device is fairly accurate and easy to operate and gives the results of measurements in fractions of a second directly. Its calibration can readily be determined mathematically since it is dependent
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