The evolution of time measurement, Part 2: quartz clocks [Recalibration]
@article{Lombardi2011TheEO, title={The evolution of time measurement, Part 2: quartz clocks [Recalibration]}, author={Michael A. Lombardi}, journal={IEEE Instrumentation \& Measurement Magazine}, year={2011}, volume={14} }
Quartz clocks are the most common timekeepers of all. Billions of quartz oscillators are manufactured annually for use inside clocks, watches, mobile phones, computers, radios, and televisions. In this article, Part 2 of a five-part series, I discuss the evolution of quartz clocks, beginning with the discovery of piezoelectricity.
7 Citations
WWVB: A Half Century of Delivering Accurate Frequency and Time by Radio
- GeologyJournal of research of the National Institute of Standards and Technology
- 2014
A history of the National Institute of Standards and Technology (NIST) radio station WWVB is provided, from its origins as a source of standard frequency, to its current role as the source of time-of-day synchronization for many millions of radio controlled clocks.
Designing and Manufacturing Quartz Crystal Oscillators
- Materials ScienceComputational Intelligence and Efficiency in Engineering Systems
- 2015
The characteristic of quartz crystals oscillator and the factors that affect the frequency stability of quartz crystal oscillator are presented and the manufacturing process is discussed.
A review of the lunar laser ranging technique and contribution of timing systems
- Physics
- 2016
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Imaging of Surface Vibrations Using Heterodyne Interferometry
- Physics
- 2014
Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Kimmo Kokkonen Name of the doctoral dissertation Imaging of Surface Vibrations Using Heterodyne Interferometry Publisher School of…
A demonstration of the conservation of the orbital angular momentum of Earth
- Physics, Education
- 2015
We describe a simple but quantitative experiment to demonstrate the conservation of angular momentum. We measure the correlation of the apparent radius and angular velocity of the Sun with respect to…
Microfluidic device prototyping via laser processing of glass and polymer materials
- Materials Science
- 2014
In this thesis, three different processes for the fabrication of microchannels in three different base materials were experimentally and numerically modelled in detail in order to understand the…
Security issues of quantum cryptographic systems with imperfect detectors
- Computer Science
- 2015
This thesis analyzes the security of a high-speed QKD system with finite detector dead time, and shows that the previously reported sifting approaches are not guaranteed to be secure in this regime, and reports an afterpulsing effect present when the SNSPD is operated in the high bias current regime.
References
SHOWING 1-10 OF 22 REFERENCES
Precision Quartz Resonator Frequency Standards
- PhysicsProceedings of the IRE
- 1954
High-precision quartz crystal resonators were recently added as a part of the primary standard of frequency at the National Bureau of Standards. Their reliability over short and long periods of time…
Precision Determination of Frequency
- Computer ScienceProceedings of the Institute of Radio Engineers
- 1928
Two different types of standard which meet the requirement that their rates shall be so constant that the total number of variations executed in a time of known duration may be taken as a measure of the rate over shorter intervals of time are described.
A review of the recent development of MEMS and crystal oscillators and their impacts on the frequency control products industry
- Engineering2008 IEEE Ultrasonics Symposium
- 2008
The author expands on the subject by reviewing the development of the all silicon MEMS oscillators and crystal oscillators in the past few years and commenting on what challenges they face in the highly competitive frequency control products industry.
The Piezo-Electric Resonator
- EngineeringProceedings of the Institute of Radio Engineers
- 1922
The general theory of piezo-electricity is summarized, and the equations applicable to quartz are stated. The "concentrated mass theory" of longitudinal vibrations in rods is then developed, and the…
The evolution of the quartz crystal clock
- Political ScienceBell Syst. Tech. J.
- 1948
Since that period there has been a continuous use and improvement of timekeeping methods and devices, following sometimes quite independent lines, but developing through a long series of new ideas and refinements into the very precise means at the authors' disposal today.
Piezoelectricity An Introduction to the Theory and Applications of Electromechanical Phenomena in Crystals
- EngineeringNature
- 1947
Getting the books piezoelectricity an introduction to the theory and applications of electromechanical phenomena in crystals now is not type of inspiring means. You could not by yourself going next…
THE CRYSTAL CLOCK.
- MathematicsProceedings of the National Academy of Sciences of the United States of America
- 1930
'Gesammelte Werke, 1876, p. 261. 2 The Latin indices h, i, j,. . . range through the values 1, 2, ... n, the Greek a, jS, y.. . through 1, 2, . .. m, and the Greek or, a, T, . . . through m + 1, m +…