Topic
Crystal oven
About: Crystal oven is a research topic. Over the lifetime, 955 publications have been published within this topic receiving 10380 citations. The topic is also known as: oven-controlled crystal oscillator & OCXO.
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02 Oct 1988
TL;DR: In this article, the temperature derivative of piezoelectric coupling as a function of orientation angle is presented for temperature-compensated crystal oscillator (TCXO) applications.
Abstract: Measurements of resonance frequency versus temperature have been made on many accurately characterized quartz vibrators as part of an effort to obtain a highly precise set of material parameters to replace the most widely used set, which is now 25 years old. Preliminary data are presented for the first temperature derivative of piezoelectric coupling as a function of orientation angle. These numbers permit prediction of temperature coefficient change as a function of location on the impedance circle and are important for temperature-compensated crystal oscillator (TCXO) applications. >
1 citations
TL;DR: A thin film Colpitt type 3.155 MHz crystal oscillator has been designed and fabricated in this article, where both the circuit and the crystal are contained within a temperature controlled oven as protection against ambient temperature changes.
Abstract: A thin film Colpitt type 3.155 MHz crystal oscillator has been designed and fabricated. This meets the requirements of high stability combined with small physical dimensions. Both, the circuit and the crystal are contained within a temperature controlled oven as protection against ambient temperature changes. Such an oscillator has many applications.
1 citations
01 Sep 1929
TL;DR: In this paper, a frequency multiplying vacuum-tube amplifier is used to obtain crystal control of high-frequency transmitters from crystals of lower frequency by means of a frequency-multiplication vacuum tube amplifier, which produces regeneration through the grid-plate feed back in the tube.
Abstract: A commonly used method is described for obtaining crystal control of high-frequency transmitters from crystals of lower frequency by means of a frequency multiplying vacuum-tube amplifier. An experimental study of the operation of the system is made when doubling and tripling the frequency of a 4000-kc crystal-controlled oscillator, and comparisons are made with the operation of the same system when balanced and amplifying the fundamental frequency. Relations between d-c negative grid voltage and r-f input voltage for maximum efficiency are shown to be critical and nearly constant for any one order of multiplication. Satisfactory operation of the system is shown to depend upon inductive reactance in the grid circuit, which produces regeneration through the grid-plate feed back in the tube. The study is based on circuit efficiencies as measured by the contact pyrometer method.
1 citations
Journal Article•
TL;DR: In this article, a new very high frequency crystal oscillator has been developed for the safety test system of some rocket on the base of this analysis, the results of airborne test are showed that the oscillator works reliably and the performance has been improved.
Abstract: To meet the demand of space application, the various factors to affect the degree of frequency stability, accuracy and aging rate for very high frequency crystal oscillator are analyzed in this paper. A new very high frequency crystal oscillator has been developed for the safety test system of some rocket on the base of this analysis. The results of airborne test are showed that the oscillator works reliably and the performance has been improved.
1 citations