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Temp. compensating crystal oscillator and its mfg. method

A technology for crystal oscillators and temperature compensation, applied in power oscillators, electrical components, output stabilization, etc., can solve the problems that discrete TCXOs cannot be successfully applied to mobile communication terminals, and the compactness of temperature-compensated crystal oscillators is limited.

Inactive Publication Date: 2005-11-23
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Also, the compactness of conventional temperature-compensated crystal oscillators is severely limited because of the space required to place the temperature-compensation components
For this consideration, this discrete TCXO cannot be successfully applied to mobile communication terminals

Method used

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  • Temp. compensating crystal oscillator and its mfg. method
  • Temp. compensating crystal oscillator and its mfg. method
  • Temp. compensating crystal oscillator and its mfg. method

Examples

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Embodiment Construction

[0026] The present invention will be further illustrated by examples in conjunction with the accompanying drawings.

[0027] figure 2 A side sectional view of a crystal package according to an embodiment of the present invention is shown; as shown in the figure, a crystal package 20 constituting a crystal oscillator includes a ceramic board 21 with a crystal oscillating plate 25 placed inside. The ceramic plate 21 is covered by a metal layer 23 . The metal layer 23 is used to protect the crystal oscillator 21 from external electrical and mechanical influences.

[0028] The crystal oscillating plate 21 is fixed by adhering one end thereof to the first protrusion 26 with a conductive adhesive 25 . In addition, the crystal oscillator plate 21 is supported on the first protrusion 27 at the other end to freely oscillate. The bottom end of the first protrusion 26 is connected to the conductive via 24 so that the first protrusion 26 is connected to an external device.

[0029] C...

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PUM

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Abstract

A temperature compensated crystal oscillator is disclosed, which comprises a crystal package including a package board and a crystal oscillating piece, conductive patterns for constituting a temperature compensating circuit formed on a surface of the package board, exterior terminals formed at corners of the board, temperature compensating components formed on the surface of the board, and resin molded part enveloping the surface of the board. With a lower surface of a crystal package serving as a component mounting area, it is not necessary to provide an additional printed circuit board required for mounting of temperature compensating components, and it is possible to provide a compact TCXO having a surface area corresponding to that of a crystal package.

Description

field of invention [0001] The present invention relates to a temperature-compensated crystal oscillator and its manufacturing method, in particular to a temperature-compensated crystal oscillator and its manufacturing method, trying to obtain a compact structure of the product by using the lower surface as an area for placing components. Background technique [0002] A crystal oscillator using a quartz oscillator is a main element for generating an oscillation frequency that controls signals transmitted and received between mobile communication terminals, and is more advanced than other oscillators in frequency stability. However, the quartz oscillator has a disadvantage that its oscillation frequency varies according to the ambient temperature. In order to overcome this disadvantage, some additional components must be added to the crystal oscillator to compensate for frequency variations due to this temperature characteristic of the crystal oscillator. Such a crystal oscil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B5/32H03L1/02
CPCH03L1/028
Inventor 金钟泰金亨坤
Owner SAMSUNG ELECTRO MECHANICS CO LTD