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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01 Jun 1934
TL;DR: In this paper, a brief account of the developments conducted previous to 1930 which resulted in improved frequency stability for quartz crystal controlled oscillators is given, with the author's theory of operation and both laboratory and operating data on its performance.
Abstract: A brief account is given of the developments conducted previous to 1930 which resulted in improved frequency stability for quartz crystal controlled oscillators. An improved oscillator circuit is shown with the author's theory of operation and both laboratory and operating data on its performance. Commercial equipment using this circuit has demonstrated consistent stability of better than 10 parts in 106.
1 citations
Patent•
20 Nov 2013
TL;DR: In this article, the kyropoulos method sapphire crystal oven heating body structure is characterized in that the tungsten rods are bundled together by using half-tungsten rings and Tungsten-rhenium wires to form a quadrilateral structure.
Abstract: The utility model belongs to the technical field of sapphire single crystal (alumina single crystal) growth equipment, and particularly relates to a kyropoulos method sapphire crystal oven heating body structure. The kyropoulos method sapphire crystal oven heating body structure comprises tungsten rods and is characterized in that the tungsten rods are bundled together by using half tungsten rings and tungsten-rhenium wires to form a quadrilateral structure; a plurality of groups of reinforcing rods are arranged in the quadrilateral structure; each group of reinforcing rods are two reinforcing tungsten support rods which are mutually crossed; both ends of the reinforcing tungsten support rods are directly welded on the connecting positions of the tungsten rods and the half tungsten rings so that a plurality of triangular structures are formed. According to the utility model, the quadrilateral structure is changed into the triangular structure through the arrangement of the reinforcing rods, and the triangular structure is very stable without being deformed, so that the deformation of a heating body can be effectively reduced, the life of the heating body can be greatly prolonged, and furthermore, the production cost is reduced and the crystal quality is enhanced.
1 citations
31 May 1989
TL;DR: In this paper, the current state of the art of pulsed VHF/UHF transmitters, using quartz crystal resonators of minimum weight and volume is reviewed together with measurements on simple oscillator and frequency multiplier circuitry.
Abstract: The parameters that directly influence the design of stable, coherent and pulsed VHF/UHF sources are identified. Assuming currently available commercial technology, an attempt is made to identify the optimum frequency, for maximum range, at which systems used for animal tracking should operate. The current state of the art of pulsed VHF/UHF transmitters, using quartz crystal resonators of minimum weight and volume is reviewed together with measurements on simple oscillator and frequency multiplier circuitry. Commercial chemically etched fundamental and overtone quartz crystal oscillators in the VHF frequency band have only recently become available; the performance of these units is compared with that available from low-ESR (effective series resistance) quartz crystal oscillators operating at third overtone in the 60-100-MHz region and with frequency multiplication factors of 3-8. Areas are identified where further research and development are required. >
1 citations