The Experts below are selected from a list of 5247 Experts worldwide ranked by ideXlab platform

R F Kubichek - One of the best experts on this subject based on the ideXlab platform.

  • investigating sampling and quantization using a Digital storage Oscilloscope
    International Conference on Acoustics Speech and Signal Processing, 2001
    Co-Authors: J W Pierre, R F Kubichek
    Abstract:

    The objective of this paper is to reinforce students' understanding of sampling through experimentation. The scope of this paper is very narrow, focusing on a single laboratory exercise for learning about sampling, which is a critically important topic for students to comprehend. The Digital Oscilloscope makes an ideal platform for studying sampling, aliasing, and quantization, because not only does the Digital Oscilloscope have a built in A/D converter and all the supporting electronics, but it has display capabilities in both the time and frequency domains. Additionally, students obtain a better understanding of test and measurement equipment such as the Digital Oscilloscope.

  • ICASSP - Investigating sampling and quantization using a Digital storage Oscilloscope
    2001 IEEE International Conference on Acoustics Speech and Signal Processing. Proceedings (Cat. No.01CH37221), 2001
    Co-Authors: J W Pierre, R F Kubichek
    Abstract:

    The objective of this paper is to reinforce students' understanding of sampling through experimentation. The scope of this paper is very narrow, focusing on a single laboratory exercise for learning about sampling, which is a critically important topic for students to comprehend. The Digital Oscilloscope makes an ideal platform for studying sampling, aliasing, and quantization, because not only does the Digital Oscilloscope have a built in A/D converter and all the supporting electronics, but it has display capabilities in both the time and frequency domains. Additionally, students obtain a better understanding of test and measurement equipment such as the Digital Oscilloscope.

J W Pierre - One of the best experts on this subject based on the ideXlab platform.

  • investigating sampling and quantization using a Digital storage Oscilloscope
    International Conference on Acoustics Speech and Signal Processing, 2001
    Co-Authors: J W Pierre, R F Kubichek
    Abstract:

    The objective of this paper is to reinforce students' understanding of sampling through experimentation. The scope of this paper is very narrow, focusing on a single laboratory exercise for learning about sampling, which is a critically important topic for students to comprehend. The Digital Oscilloscope makes an ideal platform for studying sampling, aliasing, and quantization, because not only does the Digital Oscilloscope have a built in A/D converter and all the supporting electronics, but it has display capabilities in both the time and frequency domains. Additionally, students obtain a better understanding of test and measurement equipment such as the Digital Oscilloscope.

  • ICASSP - Investigating sampling and quantization using a Digital storage Oscilloscope
    2001 IEEE International Conference on Acoustics Speech and Signal Processing. Proceedings (Cat. No.01CH37221), 2001
    Co-Authors: J W Pierre, R F Kubichek
    Abstract:

    The objective of this paper is to reinforce students' understanding of sampling through experimentation. The scope of this paper is very narrow, focusing on a single laboratory exercise for learning about sampling, which is a critically important topic for students to comprehend. The Digital Oscilloscope makes an ideal platform for studying sampling, aliasing, and quantization, because not only does the Digital Oscilloscope have a built in A/D converter and all the supporting electronics, but it has display capabilities in both the time and frequency domains. Additionally, students obtain a better understanding of test and measurement equipment such as the Digital Oscilloscope.

G. Cauffet - One of the best experts on this subject based on the ideXlab platform.

  • Improvement in the linearity of fast Digital Oscilloscopes used in averaging mode
    IEEE Transactions on Instrumentation and Measurement, 1993
    Co-Authors: Y. Lembeye, J.p. Keradec, G. Cauffet
    Abstract:

    Accurate measurement of signals with very fast variations between values separated by several orders of magnitude is difficult. When signals are periodic, a fast Digital Oscilloscope can be used in an averaging mode but the measurement accuracy is mainly limited by analog to Digital conversion (ADC) linearity. Several methods for improving the conversion linearity are proposed. These methods are theoretically justified and experimentally validated. Several of these methods can be used simultaneously by a Digital Oscilloscope to provide, in an averaging mode, with a 8-b ADC, the linearity of a 11-b or 12-b ADC. Residual errors are caused mainly by drifts of ADC characteristics. The compatibility of the proposed methods is discussed. >

  • Digital Oscilloscope measurements in high frequency power electronics
    [1992] Conference Record IEEE Instrumentation and Measurement Technology Conference, 1992
    Co-Authors: G. Cauffet, J.p. Keradec
    Abstract:

    A Digital Oscilloscope operating in conjunction with a workstation for control, correction, and mathematical processing has been developed for static converter studies. The authors develop the specifications of the Digital Oscilloscope for high frequency power electronic applications. Characteristics which may produce inaccuracies are reported. Remedies for the correction of residual errors are presented.

  • Digital Oscilloscope measurements in high-frequency switching power electronics
    IEEE Transactions on Instrumentation and Measurement, 1992
    Co-Authors: G. Cauffet, J.p. Keradec
    Abstract:

    The requirements for measuring instantaneous power of a switching power circuit using a Digital storage Oscilloscope are discussed. The measurements are difficult to perform and involve the use of high-speed, high-resolution measurement instrumentation. Careful consideration needs to be given to overload conditions. Averaging and advanced sampling techniques are necessary to obtain a satisfactory result. Performance enhancements of instruments that will allow improvement of the quality of the measurements remain desirable. An indication of measurement accuracy is obtained by comparing the mean dissipated power to the same quantity obtained by a calorimetric test (water flow heating). The mean dissipated power is the integral of the instantaneous power divided by the switching period. The two results agree within 5%.

J.p. Keradec - One of the best experts on this subject based on the ideXlab platform.

  • Improvement in the linearity of fast Digital Oscilloscopes used in averaging mode
    IEEE Transactions on Instrumentation and Measurement, 1993
    Co-Authors: Y. Lembeye, J.p. Keradec, G. Cauffet
    Abstract:

    Accurate measurement of signals with very fast variations between values separated by several orders of magnitude is difficult. When signals are periodic, a fast Digital Oscilloscope can be used in an averaging mode but the measurement accuracy is mainly limited by analog to Digital conversion (ADC) linearity. Several methods for improving the conversion linearity are proposed. These methods are theoretically justified and experimentally validated. Several of these methods can be used simultaneously by a Digital Oscilloscope to provide, in an averaging mode, with a 8-b ADC, the linearity of a 11-b or 12-b ADC. Residual errors are caused mainly by drifts of ADC characteristics. The compatibility of the proposed methods is discussed. >

  • Digital Oscilloscope measurements in high frequency power electronics
    [1992] Conference Record IEEE Instrumentation and Measurement Technology Conference, 1992
    Co-Authors: G. Cauffet, J.p. Keradec
    Abstract:

    A Digital Oscilloscope operating in conjunction with a workstation for control, correction, and mathematical processing has been developed for static converter studies. The authors develop the specifications of the Digital Oscilloscope for high frequency power electronic applications. Characteristics which may produce inaccuracies are reported. Remedies for the correction of residual errors are presented.

  • Digital Oscilloscope measurements in high-frequency switching power electronics
    IEEE Transactions on Instrumentation and Measurement, 1992
    Co-Authors: G. Cauffet, J.p. Keradec
    Abstract:

    The requirements for measuring instantaneous power of a switching power circuit using a Digital storage Oscilloscope are discussed. The measurements are difficult to perform and involve the use of high-speed, high-resolution measurement instrumentation. Careful consideration needs to be given to overload conditions. Averaging and advanced sampling techniques are necessary to obtain a satisfactory result. Performance enhancements of instruments that will allow improvement of the quality of the measurements remain desirable. An indication of measurement accuracy is obtained by comparing the mean dissipated power to the same quantity obtained by a calorimetric test (water flow heating). The mean dissipated power is the integral of the instantaneous power divided by the switching period. The two results agree within 5%.

Haruo Saito - One of the best experts on this subject based on the ideXlab platform.

  • improvement in the gamma ray timing measurements using a fast Digital Oscilloscope
    Radiation Physics and Chemistry, 2003
    Co-Authors: Haruo Saito, Toshio Hyodo
    Abstract:

    Abstract The time resolutions of a new positron lifetime spectrometer based on a fast Digital Oscilloscope are measured using BaF2 and plastic (BC-422) scintillators. It is found that the plastic scintillator has only a small advantage in the time resolution compared to BaF2. For the cascade decay of 60Co (1.17 and 1.33 MeV), the time resolution for a pair of BC-422 plastic scintillators having a size of 40 mm in diameter and 20 mm thick is about 120 ps FWHM. This value is very close to that of BaF2. Although a time resolution of 90 ps FWHM is obtained using a pair of small BC-422 plastic scintillators (30 mm in diameter, 10 mm thick), the counting rate is nearly two orders of magnitude lower than that with BaF2. It is thus concluded that the BaF2 is the best scintillator at present for the practical positron lifetime spectroscopy.

  • a new positron lifetime spectrometer using a fast Digital Oscilloscope and baf2 scintillators
    Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment, 2002
    Co-Authors: Haruo Saito, Yasuyuki Nagashima, Toshikazu Kurihara, Takeo Hyodo
    Abstract:

    Abstract A new positron lifetime spectrometer has been constructed and tested. It consists of a state-of-the-art Digital Oscilloscope (LeCroy Wavepro 960) and scintillation detectors based on Hamamatsu H3378 (R2083Q) photomultiplier tubes and BaF 2 scintillators. A very good time resolution is obtained with scintillators of commonly used sizes (28 mm in diameter, 10–20 mm thick) and wide energy window settings (40–50%). The time resolution of 144 ps full-width at half-maximum (FWHM) is achieved for the positron lifetime measurement, in which time differences are measured between the arrivals of a 1.27 MeV γ-ray from 22 Na and one of the two positron annihilation γ-rays of 0.511 MeV. The time resolution is further improved with a ‘double-stop’ setup, where timing information carried by the positron annihilation γ-ray pair is combined to determine the time of the annihilation. The time resolution with this setup is 119 ps FWHM. This improvement is interpreted in terms of the energy deposit in the scintillation detectors by γ-rays. Applications of the new spectrometer to other scintillation timing measurements are also described.