System for wireless, bi-directional transfer of electric signals

A two-way transmission, electrical signal technology, used in signal transmission systems, near-field transmission systems using transceivers, circuits, etc., can solve problems such as capacitance drop and high voltage

Inactive Publication Date: 2003-03-19
西帕克公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of capacitive transmission is that high voltage and large surface area are required for good coupling, since the capacitance decreases with increasing distance between capacitive surfaces

Method used

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  • System for wireless, bi-directional transfer of electric signals
  • System for wireless, bi-directional transfer of electric signals
  • System for wireless, bi-directional transfer of electric signals

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Embodiment Construction

[0038] The system consists of two units, each with a transceiver interface. In the following description, the two units are referred to as the "host" unit and the "client" unit, respectively. The term "host" refers to a device capable of providing a carrier frequency output. The term "client" is used here for convenience of description; a client unit according to the present invention is a mobile or portable unit. Due to the high operating current of the host unit, the device with the most stringent low power usage requirements is preferably a portable unit.

[0039] Here, it does not imply that on the protocol layer, there is a master-slave relationship between the host unit and the client unit.

[0040] Nothing in the invention itself implies that the transceiver is an integral part of either the host interface or the client interface.

[0041] exist figure 1 In the schematic illustration of FIG. 1 , host computer 60 is equipped with external host unit 10 which shares a ...

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PUM

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Abstract

A low-cost system for wireless, bi-directional transformation of electric signals over a capacitive interface between a host unit and a guest unit is provided. The system allows a high impedance in the circuitry of the guest unit to obtain a good signal transfer ability in conditions of poor dieelectric materials, poor conductivity in the contact pads and relatively large gaps between the contact pads. The capacitive interface comprises a respective first (A1; B1), second (A2; B2) and third (A3; B3) conductive area in the host and guest units (10, 40). The first conductive area (A1) of the host unit is connected to a self-tuning frequency generating resonant circuit (16) in the host unit (10) for obtaining high gain of signals transmitted to the guest unit (40). The second and third conductive areas (A2, A3) of the host unit are connected to an impedance circuit (30) in the host unit for receiving signals from the guest unit. The first and second conductive areas (B1, B2) of the guest unit are further connected to an impedance circuit (44) in the guest unit for receiving signals from the host unit. In a preferred embodiment, the first and third conductive areas (B1, B3) of the guest unit are also galvanically interconnected.

Description

technical field [0001] The present invention relates to a system for wireless two-way transmission of electrical signals between a host computer such as a data reader and a mobile client unit such as a message bearer, and more particularly to a packaging method such as a cardboard like that. Although electrical signals are primarily used to represent digital data information, the system can also be used to transfer electrical power from stationary units to mobile client units. [0002] The prior art for systems of this type is known from US Patent Nos. 4,876,535 and 5,847,447. Background technique [0003] Today's advances in mobile computing have resulted in a plethora of small, portable devices that typically run on batteries. Applications range from cellular phones, handheld computers, to data acquisition equipment such as electronic meters, data loggers, and more. Now, sufficient data processing capability is incorporated to perform direct d...

Claims

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Application Information

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IPC IPC(8): H04B5/02G08C17/06
CPCH01F2038/146G08C17/06
Inventor 雅各布·埃伦斯瓦德
Owner 西帕克公司
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