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communication device

A communication device and signal technology, applied in circuit devices, electrical components, transmission systems, etc., can solve problems such as malfunction, difficulty in communication devices, and voltage drop inside communication devices.

Active Publication Date: 2017-11-28
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In such devices, the transmission of signal waves is often accompanied by relatively large power consumption
Therefore, the power consumption may increase and the internal voltage of the communication device may drop at the same time as the signal wave transmission starts.
In addition, if the internal voltage drop is lower than the rated voltage of the internal circuit of the communication device, it will become difficult for the communication device to operate normally, and malfunction will occur.

Method used

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Examples

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Embodiment 1

[0022] This example illustrates the following example, namely

[0023] A communication device that is powered by electric waves sent from the outside,

[0024] A plurality of radio wave systems are installed in the communication device, which supply electric power or signals obtained from the above-mentioned radio waves to the communication device,

[0025] The first radio wave system among the plurality of radio wave systems is connected so as to supply power to a circuit for driving a transmission element for transmitting a signal from the communication device,

[0026] Another radio wave system is connected to a signal generator for generating a signal transmitted by the communication device.

[0027] In addition, in this embodiment, an example of a communication device in which the impedance of the signal generation unit is set higher than the impedance of a circuit for driving the transmission element is also described.

[0028] An example of the communication device in...

Embodiment 2

[0052] figure 2 It is an embodiment of the communication device, that is, a distribution transformer is connected to one radio wave receiving element that receives radio waves, and a plurality of radio wave systems are connected from the parts obtained by dividing into two or more by the distribution transformer.

[0053] Specifically, the second embodiment includes the rectification unit 100 , the rectification unit 130 , the signal wave transmission antenna 111 , the transmission antenna drive unit 110 , the signal generation unit 120 , and the conversion transformer 112 similarly to the first embodiment. In addition, a radio wave receiving antenna 510 and a distribution transformer 511 for distributing electric power received by the radio wave receiving antenna 510 are provided, and the electric power distributed by the distribution transformer 511 is input to the rectification unit 100 and the rectification unit 130 .

[0054] According to this embodiment, two rectified p...

Embodiment 3

[0056] image 3 It is an embodiment of the communication device, that is, at least one of other radio wave systems is connected to the clock generating unit in the signal generating unit, and the clock obtained by regenerating the radio wave clock by the clock regeneration circuit is used as the clock of the communication device.

[0057] More specifically, Embodiment 3 includes the same as Embodiment 1: a first radio wave receiving antenna 101, a first rectifying unit 100, a signal wave transmitting antenna 111, a transmitting antenna driving unit 110, a signal generating unit 120, a conversion transformer 104, and a conversion transformer 104. The transformer 112 and the second radio wave receiving antenna 133 are connected to the clock regeneration circuit 201 . The clock regeneration circuit 201 regenerates the clock of the received radio wave, and inputs it to the calculation unit 121 . Calculation processing is performed by the clock input from the clock regeneration ci...

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Abstract

A communication device is driven by wireless power derived from an electric power wave transmitted from an external wireless power feed device. A plurality of electric power wave reception antennas (101 and 133) are provided in the communication device. Electric power for a signal transmission antenna 111 is supplied from the first electric power wave reception antenna 101, while independently from that, electric power for a signal generation portion 120 is supplied by the second electric power wave reception antenna 133. As a result, the signal generation portion is stably driven, internal voltage drop does not occur, and malfunction is prevented. Moreover, a clock is regenerated from the second electric power wave reception antenna 133 so that a clock generation portion does not have to be provided.

Description

technical field [0001] The present invention relates to a communication device that is powered by radio waves transmitted from the outside and is driven. Background technique [0002] Among communication devices that do not have a power source, there are devices that receive radio waves transmitted from an external wireless power supply device and generate operating power for the communication device itself from the radio waves. In addition, such a communication device has a function of storing information in the communication device and transmitting an information signal as a signal wave to the outside when the communication device is in operation. [0003] In such devices, the transmission of signal waves is often accompanied by relatively large power consumption. Therefore, the power consumption may increase and the internal voltage of the communication device may drop at the same time as the start of signal wave transmission. Furthermore, if the amount of internal volt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/27
CPCH04B5/0037H04B5/0031
Inventor 佐藤新之介新妻研作
Owner HITACHI LTD
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