Quartz frequency standards
作者： E.A. Gerber , R.A. Sykes
关键词: Quartz 、 Crystal oscillator 、 Engineering 、 Electronic engineering 、 Engineering physics 、 Crystal oven 、 Field (physics) 、 Crystal 、 Compensation (engineering) 、 Emphasis (telecommunications) 、 Millisecond
摘要: This paper reviews progress made over the past few years in field of quartz crystal frequency standards. Several accomplishments which are thought to be special importance discussed detail. These subjects include, among others, vibrator enclosures, modes motion including "trapped energy" concept, and studies material. It has been demonstrated that Q synthetic can improved a value equivalent natural quartz. Progress long-term stability precision units is described various reasons for aging such discussed. The characteristics oscillators reviewed, temperature compensation influences severe environment. properties high-precision standards with specific emphasis on aging, problem short-term Precision available today daily drift rate as low parts 1011and better than 1010for period one millisecond.
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