Results 251 to 260 of about 124,588 (288)

Implementation of the real-time assessment of dynamic allan deviation and dynamic time deviation

2014 European Frequency and Time Forum (EFTF), 2014
In the paper the realization of the methods enabling real-time computation of dynamic Allan deviation and dynamic time deviation is described. The idea of real-time analysis of timing signals using dynamic approach is described first. Then the main features of the algorithms enabling the analysis and their implementation are presented and discussed.
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Allan deviation measurements of a cryogenic all-sapphire Fabry-Perot reference cavity

Proceedings of 20th Biennial Conference on Precision Electromagnetic Measurements, 2002
An all-sapphire Fabry-Perot cavity is temperature controlled in a cryogenic (/spl sim/5 K) environment. The cavity is used as a frequency reference to stabilise the output of a diode pumped Nd:YAG laser. The expected stability is discussed and Allan Deviation measurements presented.
M. Notcutt, C.T. Taylor, E.K. Wong, A.G. Mann, D.G. Blair   +4 more
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An Algorithm to Estimate the Power Spectral Density From Allan Deviation

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Complex architectures for wireless communications, digital electronics, and space-based navigation interlink several oscillator-based devices such as clocks, transponders, and synthesizers. Estimators characterizing their stability are critical for addressing the impact of random fluctuations (noise) on the overall system performance.
De Marchi, Fabrizio, Plumaris, Michael K., Burt, Eric A., Iess, Luciano   +3 more
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Use of Allan Deviation for Characterizing Satellite Microwave Sounder Noise Equivalent Differential Temperature (NEDT)

IEEE Geoscience and Remote Sensing Letters, 2015
Currently, the instrument sensitivity of sensors onboard weather satellites is quantified by computing the standard deviation of the measurements taken from their calibration targets. The standard deviation is valid for describing the spread of a statistical distribution of the measured values around its mean that is stable.
null Miao Tian, null Xiaolei Zou, null Fuzhong Weng   +2 more
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3.3 A 0.51nW 32kHz Crystal Oscillator Achieving 2ppb Allan Deviation Floor Using High-Energy-to-Noise-Ratio Pulse Injection

2020 IEEE International Solid- State Circuits Conference - (ISSCC), 2020
In ultra-low-power crystal oscillators (XOs), the ideal circuit consumes minimum power while disturbing the oscillation as little as possible. In order to achieve sub-nW power consumption, there are three fundamental considerations: the loss in the crystal, the efficiency of energy injection, and the power required to extract oscillation frequency and ...
Li Xu, Taekwang Jang, Jongyup Lim, Kyojin Choo, David Blaauw, Dennis Sylvester   +5 more
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Allan-Deviation Measurements of Gate-Tunable Single Electron Pumps with the Ultrastable Low-Noise Current Amplifier

2018 Conference on Precision Electromagnetic Measurements (CPEM 2018), 2018
We characterized KRISS precision measurement system by measuring the Allan deviation of the quantized current generated by GaAsl AIGaAs gate-tunable electron pumps, where the current was amplified by the ultrastable low-nose current amplifier (ULCA) developed by the PTB.
Myung-Ho Bae, Ye-Hwan Ahn, Changki Hong, Yunchul Chung, Dong-Hun Chae, Mun-Seog Kim, Wan-Seop Kim, Nam Kim   +7 more
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A Mode-Matched Silicon-Yaw Tuning-Fork Gyroscope With Subdegree-Per-Hour Allan Deviation Bias Instability

Journal of Microelectromechanical Systems, 2008
In this paper, we report on the design, fabrication, and characterization of an in-plane mode-matched tuning-fork gyroscope (M2-TFG). The M2-TFG uses two high-quality-factor (Q) resonant flexural modes of a single crystalline silicon mi- crostructure to detect angular rate about the normal axis.
M.F. Zaman, A. Sharma, null Zhili Hao, F. Ayazi   +3 more
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ThêoH: a hybrid, high-confidence statistic that improves on the Allan deviation

Metrologia, 2006
‘Theo1’ (short terminology for ‘theoretical variance #1’) is derived based on, a variance that separates the Allan variance'saveraging time(τ) from itssampling interval(τs), also called ‘stride’, as applied to normalized fractional-frequencyy(t). The τ-length average ofy(t) is denoted, and every permissible squared difference of-values inis averaged ...
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A 46μW, 8.2MHz self-threshold-tracking differential relaxation oscillator with 7.66psrms period jitter and 1.56ppm allan deviation floor

2018 IEEE Custom Integrated Circuits Conference (CICC), 2018
This paper presents an 8.2MHz relaxation oscillator with swing boosting and self threshold tracking, designed to improve both period jitter and frequency stability. A self-threshold-tracking loop ensures the switching threshold is kept in a constant, reducing the frequency uncertainty from process, temperature and supply voltage variations. Implemented
Shao-Yung Lu, Yu-Te Liao
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The use of the Allan deviation for the measurement of the noise and drift performance of microwave radiometers

Measurement Science and Technology, 2007
The use of the Allan deviation for the analysis of signal noise and drift components is considered in the context of microwave radiometry. The noise behaviour of two types of microwave radiometer is modelled and compared with measurements of the performance of these radiometers analysed using the Allan deviation method.
D V Land, A P Levick, J W Hand
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