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Dual-mode crystal oscillator

A crystal oscillator and crystal cutting technology, applied in electrical components, impedance networks, etc., can solve the problems of complex electrical wiring and high power consumption

Active Publication Date: 2015-12-30
NIHON DEMPA KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, if a total of three frequencies including the clock signal frequency are output, wiring becomes complicated and power consumption increases

Method used

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  • Dual-mode crystal oscillator
  • Dual-mode crystal oscillator
  • Dual-mode crystal oscillator

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0061] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in the following description, unless the content which limits this invention is especially described, the scope of this invention is not limited to these aspects.

[0062] (first embodiment)

[0063]

[0064] figure 1 is an exploded perspective view of the dual-mode crystal oscillator 100 . The dual-mode crystal oscillator 100 is a surface mount type crystal oscillator, and is used mounted on a printed circuit board or the like. The dual-mode crystal oscillator 100 is mainly formed by a crystal vibrating plate 110 , an integrated circuit (Integrated Circuit, IC) 120 , a package (package) 130 , and a cover plate 140 . The crystal vibrating piece 110 uses an AT-cut crystal vibrating piece. The main surface (YZ surface) of the AT-cut crystal vibrating piece is relative to the Y axis of the crystal axis (XYZ), with the X axis as the center, and in...

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Abstract

The invention provides a dual-mode crystal oscillator comprising an AT cut crystal vibrator, a package, and an integrated circuit. The integrated circuit is accommodated in the package, and the integrated circuit comprises an oscillating circuit used for making the AT cut crystal vibrator oscillate at a MHz frequency, a dividing circuit used for dividing the MHz frequency to generate a 32.768kHz frequency, and a selecting circuit used for selecting a dormant state in which the MHz frequency is not output or an active state in which the MHz frequency is output under the state of outputting the 32.768kHz frequency. The package is provided with a mounting surface, and on the mounting surface, three electrodes are formed side by side in the extending direction of the long sides, and two electrodes are formed side by side in the extending direction of the short sides. The electrodes outputting the 32.768kHz frequency and the electrodes outputting the MHz frequency are not adjacent to each other in configuration.

Description

technical field [0001] The invention relates to a dual-mode crystal oscillator with an AT-cut crystal vibration piece. Background technique [0002] At present, the crystal oscillator for the clock uses a tuning fork crystal oscillator, which outputs a 32.768kHz signal. However, the tuning-fork-type crystal resonator has a problem that its size becomes large, and the vibration frequency tends to change due to temperature changes. [0003] Furthermore, there are cases where it is desired to output other frequencies while outputting a signal of 32.768 kHz. In such a case, it is necessary to prepare another crystal resonator and arrange two capacitors for each crystal resonator to form a circuit. Therefore, a total of six components including two crystal resonators and four capacitors are required. [0004] In order to solve the problems of the above-mentioned tuning-fork crystal resonator and the need to use a plurality of parts, Patent Document 1 discloses a dual-mode cryst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H9/17H03H9/02
Inventor 陈玟任石丸千里
Owner NIHON DEMPA KOGYO CO LTD