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Wireless communication device, electronic apparatus, and moving object

A wireless communication device and circuit technology, applied in the fields of wireless communication devices, electronic equipment and mobile bodies, can solve the problems of difficult reference clock signal oscillation frequency and stability, and achieve high-precision effects

Active Publication Date: 2016-01-27
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Or, as an influence from the amplifier on the crystal vibrating plate or the oscillation circuit, it is difficult to stabilize the oscillation frequency of the reference clock signal output from the circuit obtained by oscillating the crystal vibrating plate due to the noise generated by the amplifier.

Method used

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  • Wireless communication device, electronic apparatus, and moving object
  • Wireless communication device, electronic apparatus, and moving object
  • Wireless communication device, electronic apparatus, and moving object

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Embodiment Construction

[0045] Hereinafter, preferred embodiments of the present invention will be described in detail. In addition, the present embodiment described below does not unduly limit the content of the present invention described in the claims, and all the configurations described in the present embodiment are not essential as the solution means of the present invention.

[0046] 1. Comparative example

[0047] First, a first comparative example of the present embodiment will be described. The first comparative example is an example in which the vibrating element and the wireless communication IC are packaged in a single package. However, in a plan view of the IC chip, the excitation electrodes of the vibrating element are mounted so as to overlap the amplifier of the wireless communication IC. In this case, crosstalk may increase between the amplifier of the wireless communication IC and the vibrating element or oscillation circuit, which is a factor that hinders single-package.

[0048...

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Abstract

The invention provides a wireless communication device, an electronic apparatus, and a moving object. The wireless communication circuit includes a vibration piece, and a semiconductor device that is connected to the vibration piece in order to integrate the vibration piece and a wireless communication IC into one package and thus to produce a wireless communication device by which a high-precision oscillation frequency is obtained. The semiconductor device includes an oscillation circuit of the vibration piece, and a wireless communication circuit that has an amplifier which amplifies a wireless signal that is generated by an oscillation signal from the oscillation circuit. The vibration piece and the semiconductor device are accommodated in one package. An excitation electrode of the vibration piece is arranged in the package in such a manner that the excitation electrode is not superimposed on the amplifier when the semiconductor device is viewed from above.

Description

technical field [0001] The present invention relates to wireless communication devices, electronic equipment, and mobile objects. Background technique [0002] For example, wireless communication is used in many applications such as wireless LAN, portable information terminal, short-range wireless communication, and remote control. With regard to the use of wireless communication, laws and ordinances are prescribed, and the laws and regulations define frequencies that can be used for each purpose and for each country / region. Therefore, it is necessary to determine the oscillation frequency of the crystal resonator and the multiplication frequency of the PLL circuit according to the frequency used. Conventionally, an external crystal resonator is combined with a wireless communication IC to obtain a carrier signal of a desired frequency. [0003] As a wireless communication IC with an external quartz vibrator, for example, Patent Document 1 discloses a wireless communication...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/00H04B1/40
CPCH04L27/152
Inventor 伊藤久浩
Owner SEIKO EPSON CORP