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.
Papers published on a yearly basis
Papers
More filters
Patent•
12 Jul 2005
TL;DR: In this article, the authors proposed a method to reduce the effects of temperature variations on an operating frequency of the temperature controlled frequency source by temperature compensating the temperature controlling frequency source.
Abstract: A method provides a temperature controlled frequency source. The method reduces the effects of temperature variations on an operating frequency of the temperature controlled frequency source by temperature compensating the temperature controlled frequency source.
22 citations
Patent•
17 Jan 1986TL;DR: In this article, a resonator having a desired frequency is made from a quartz crystal resonator plate by a method including the steps of: (A) etching the quartz crystal Resonator plate to a frequency slightly higher than the desired frequency, (B) vacuum desposting metallic electrodes onto the active area of the resonator, and (C) treating the plate with the deposited electrodes with UV-ozone to oxidize the electrodes in a slow, precisely controlled manner.
Abstract: A resonator having a desired frequency is made from a quartz crystal resonator plate by a method including the steps of: (A) etching the quartz crystal resonator plate to a frequency slightly higher than the desired frequency, (B) vacuum desposting metallic electrodes onto the active area of the resonator plate to lower the frequency to a frequency that very closely approaches the desired frequency, and (C) treating the plate with the deposited electrodes with UV-ozone to oxidize the electrodes in a slow, precisely controlled manner to the desired frequency.
22 citations
Patent•
10 May 2010
TL;DR: In this paper, a temperature controlled oscillator capable of detecting the surrounding temperature at a high level of precision, and obtaining stable oscillating frequencies, was presented, which was provided with a circuit substrate having a crystal resonator, an oscillating circuit, and a temperature control circuit, arranged on one or both principal surfaces.
Abstract: The present invention provides a temperature controlled oscillator capable of detecting the surrounding temperature at a high level of precision, and obtaining stable oscillating frequencies. The temperature controlled oscillator of the invention is provided with a circuit substrate having a crystal resonator, an oscillating circuit, and a temperature control circuit, arranged on one or both principal surfaces, and a container main body that accommodates the circuit substrate and has mount terminals on an outer bottom surface thereof. The temperature control circuit includes at least a first temperature sensor that detects an operating temperature of the crystal resonator, a second temperature sensor that detects a surrounding temperature of the container main body, and a heating resistor that applies heat to the crystal resonator, and lead wires extend from the circuit substrate and are connected electrically to the mount terminals. An insulation groove that passes through the circuit substrate in a thickness direction is formed between: a first lead wire closest to the second temperature sensor, and the second temperature sensor; and the heating resistor.
22 citations
01 Dec 1931
TL;DR: In this article, a theory of the dependence of the frequency of vacuum tube oscillators with operating voltages is derived and methods of causing the frequency to be independent of the operating voltage are discussed.
Abstract: The manner in which the frequency of vacuum tube oscillators depends upon the operating voltages is discussed. The theory of the dependence is derived and is shown to indicate methods of causing the frequency to be independent of the operating voltages. These methods are applied in detail to the more commonly used oscillator circuits. Experimental data are cited which show the degree of frequency stability which may be expected as a result of application of the methods outlined in the theory, and also show that the best adjustment is in substantial agreement with that predicted by theory. With a carefully built and adjusted oscillator the effects of normal variations in the operating voltages are negligible in comparison with the effects of temperature variations resulting from the changed operating currents. Methods of preventing these latter effects are not discussed in the present paper. The appendix contains an analysis of the conditions under which the performance of an oscillator may be represented by the use of linear circuit equations.
22 citations
31 May 1989
TL;DR: In this paper, two specially modified low-level, high-quality 5 MHz oscillators were tested for spectral purity and stability at the National Institute of Standards and Technology (NIST).
Abstract: Two specially modified low-level, high-quality 5 MHz oscillators were tested for spectral purity and stability at the National Institute of Standards and Technology. Using a third, high-quality, prior-technology oscillator for triangulation the individual phase-noise power spectral density of one of the oscillators was determined to be S/sub phi /(f)=-133 dB+or-2 dB below 1 rad/sup 2//Hz at a Fourier frequency of 1 Hz, while for the second oscillator it was -125 dB+or-2 dB at 1 Hz. Such oscillators can exhibit parts-in-10/sup 14/ flicker floor stability in high-precision quartz frequency-source applications. Extensive details of measurement methodology are given. >
22 citations