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A transceiver device and card reader

A technology of a transceiver device and a transceiver circuit, applied in the field of card readers, can solve problems such as large interference, and achieve the effects of increasing communication distance, improving signal quality, and reducing performance requirements

Active Publication Date: 2021-07-09
BEIJING KUANGSHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the prior art, when the radio frequency signal between the RFID card reader and the RFID electronic tag is inductively coupled, there is a problem that the carrier signal sent by the transmitter itself greatly interferes with the transceiver device itself

Method used

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  • A transceiver device and card reader
  • A transceiver device and card reader
  • A transceiver device and card reader

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Embodiment Construction

[0048] In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only some embodiments of the present invention, rather than all embodiments of the present invention, and it should be understood that the present invention is not limited by the exemplary embodiments described here.

[0049] In order to solve the above-mentioned problems, an embodiment of the present invention provides a transceiver device and a card reader having the transceiver device.

[0050] The front end of the existing transceiver device can simply use a diode detection circuit to extract the baseband envelope signal. Pass the AM wave through the detection diode, due to the one-way conduction characteristic of the detection diode, the negative part of the AM signal is cut off, leaving...

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Abstract

The invention provides a sending and receiving device and a card reader. The transceiver device includes a micro control unit, a transceiver circuit, a forward detection circuit, a negative detection circuit and a differential amplifier circuit, wherein: the transceiver circuit is connected to the differential transmitting interface of the micro control unit; the first input terminal of the forward detection circuit is connected to the transceiver The first node in the circuit is connected, the second input terminal of the positive detection circuit is connected with the second node in the transceiver circuit; the first input terminal of the negative detection circuit is connected with the first node, and the second input terminal of the negative detection circuit The end is connected with the second node; the output end of the forward detection circuit is connected with the first input end of the differential amplifier circuit, and the output end of the negative detection circuit is connected with the second input end of the differential amplifier circuit; the output of the differential amplifier circuit The terminal is connected with the receiving interface of the micro control unit. The invention can effectively reduce the influence of high signal carrier interference on the sensitivity of the transceiver device in the prior art, and can effectively improve the communication distance thereof.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a transceiver device and a card reader with the transceiver device. Background technique [0002] Near-field communication, also known as short-range wireless communication, is a short-distance high-frequency wireless communication technology that allows non-contact point-to-point data transmission and data exchange between electronic devices. ) evolved, based on RFID and interconnection technology. The radio frequency identification system includes RFID electronic tags and RFID card readers. The space (non-contact) coupling of radio frequency signals is realized through the coupling element between the RFID electronic tag and the RFID card reader. In the coupling channel, energy transmission and data exchange are realized according to the timing relationship. The RFID card reader communicates wirelessly with the RFID electronic tag through the antenna, and ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B5/00H04B5/02H04B1/40G06K7/10
CPCG06K7/10297G06K7/10336H04B1/40H04B5/00H04B5/02
Inventor 丁敬峰余振兴宋灵建付运旭
Owner BEIJING KUANGSHI TECH CO LTD
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