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Frequency switching method of radio appliance

A technology for frequency switching and wireless devices, applied in power oscillators, electrical components, transistors, etc., to solve problems such as malfunctions

Inactive Publication Date: 2005-12-07
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, there may be a problem of malfunctioning of the other receiving devices.

Method used

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  • Frequency switching method of radio appliance
  • Frequency switching method of radio appliance
  • Frequency switching method of radio appliance

Examples

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Embodiment Construction

[0016] Below, refer to the attached figure 1 as well as figure 2 Embodiments of the frequency switching method for a wireless device according to the present invention will be described. Here, in this embodiment, a wireless keyboard is used as a wireless device for description.

[0017] figure 1 It is an electronic circuit diagram showing a part of the wireless keyboard adopting the frequency switching method of the wireless keyboard of the present invention, figure 2 It is a timing chart showing ON and OFF states of each oscillator arranged in the wireless keyboard of this embodiment.

[0018] Such as figure 1 As shown, the wireless keyboard 1 has a first crystal oscillator 2 and a second crystal oscillator 3 as a plurality of (two in this embodiment) oscillators. These first crystal oscillators 2 and the second quartz crystal oscillator 3 can respectively output different oscillation signals. Each of these quartz crystal oscillators 2, 3 is respectively connected ...

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Abstract

To prevent malfunctions in an receiving device by transmitting an accurate signal through a wireless device. Each of oscillators 2 and 3 are turned to OFF state by switching a first crystal oscillator 2 of ON state to OFF state, and a second crystal oscillator 3 is turned to ON state after 20ms lapses since the first crystal oscillator 2 is switched to OFF state. According to this arrangement, the second crystal oscillator 3 is switched to ON state from the first crystal oscillator 2.

Description

technical field [0001] The present invention relates to a frequency switching method of a wireless device, especially a frequency switching method of a wireless device capable of communicating with a plurality of receiving devices. Background technique [0002] In recent years, wireless devices such as keyboards and mice, which can perform wireless data transmission, are not limited by cables and are widely used for convenience such as remote operation. [0003] In addition, among the above-mentioned wireless devices, conventionally, a wireless device that enables a plurality of receiving devices such as a computer to communicate by transmitting a plurality of signals with different frequencies is known. [0004] Such a wireless device including a plurality of receiving devices capable of communicating, which has a plurality of oscillators such as a quartz crystal oscillator and outputs signals of different oscillation frequencies, will be described. Moreover, the wireless ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/62H03B5/12H04B1/04
Inventor 村中哲夫
Owner ALPS ALPINE CO LTD
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