Title :
Underearth Quartz Crystal Resonators
Author :
Pendleton, Thomas A.
Author_Institution :
National Bureau of Standards, Washington, D.C.
Abstract :
Advantages of using precision quartz resonators in conjunction with frequency standard oscillators are explained. Advantages of locating the precision-resonators underearth are also described. A method of measuring resonator drift rate with sensitivity of the order of 2 parts in 1010 by means of a direct voltage instead of a high-stability variable oscillator is explained.
Keywords :
Clocks; Earth; Electric shock; Frequency measurement; Oscillators; Resonant frequency; Soil; Stability; Temperature; Time measurement;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1953.274187
