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Heating system for double-ovenized oscillator on single printed circuit board

A technology of printed circuit boards and oscillators, which is applied in the field of heating systems of double-furnace oscillators, and can solve the problems of complex manufacturing of the system, complicated and expensive housing efforts, etc.

Inactive Publication Date: 2010-09-01
WICKTRON INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such systems are complex and expensive to manufacture, requiring multiple printed circuit boards
Associated with multiple boards is the complexity of connecting those boards
The use of multiple circuit boards also requires larger packages, complicating efforts to reduce the volume of the housing

Method used

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  • Heating system for double-ovenized oscillator on single printed circuit board
  • Heating system for double-ovenized oscillator on single printed circuit board
  • Heating system for double-ovenized oscillator on single printed circuit board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A unit designed with the idea of ​​two ovens (twin oven) has been tested. The unit so tested included the board assembly housed in a C0-8 eurocase enclosure. The crystal used was a third overtone 5 MHz SC in a HC-37 / U holder.

[0034] A temperature analysis with the primary (inner) furnace enabled and the secondary (outer) furnace disabled as in image 3 shown. As shown, tests of the design are provided at 10°C, 35°C and 70°C. The temperature analysis results were compared with Figure 4 Compared with the temperature analysis results shown, where Figure 4 Is the case where the primary furnace is disabled and the secondary furnace is enabled. In both cases, the heat gain at the crystal is comparable to that of a standard single furnace Euro-type OCXO.

[0035] Figure 5The thermal analysis shown shows the performance when both furnaces are activated. It can be noticed that at the crystal, the heat gain increases dramatically, while the change in the temperature ...

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PUM

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Abstract

A system is provided for the regulation of temperature of a crystal oscillator, that system having a thermally conductive support disposed upon a substrate and upon which is disposed the crystal oscillator, an array of thermal vias disposed around the crystal oscillator within the substrate, at least one primary heater communicating with the support, a thermal enclosure communicating with the array of thermal vias, and a at least one secondary heater communicating with the enclosure.

Description

[0001] related application [0002] This application claims priority to co-pending US Utility Model Application Serial No. 11 / 876835, filed October 23, 2007, the contents of which are incorporated herein by reference. technical field [0003] This invention relates to crystal oscillators, and more particularly to heating systems for double-ovenized oscillators on printed circuit boards. Background technique [0004] Temperature-controlled crystal oscillators (OCXOs) are used in high-frequency applications. The double furnace structure ensures a stable operating temperature, reducing temperature fluctuations that can affect the function of the piezoelectric resonator and introduce errors into the frequency. A double oven configuration works by keeping both ovens above the maximum operating ambient temperature. For operation at the point of zero slope on the frequency-temperature curve, the crystal characteristics are matched to this temperature. This curve is usually repre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L1/04
CPCH03L1/04
Inventor M·F·瓦克尔
Owner WICKTRON INT CORP
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