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An RFID card reader transceiver device and a system

A technology of transceiver devices and transceiver systems, applied in transmission systems, cooperative devices, instruments, etc., can solve the problems of high carrier signal interference and limited receiver sensitivity, etc., achieve load balance, improve reading sensitivity and reading distance , Improve the effect of reading and writing distance

Active Publication Date: 2019-02-01
丁天威
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a RFID card reader transceiver device and system, which solves the problem of traditional RFID card readers that limit receiver sensitivity due to large carrier signal interference, and can effectively improve the reading and writing distance of the card reader. Realize the reading distance to reach the minimum power response working distance of RFID

Method used

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  • An RFID card reader transceiver device and a system
  • An RFID card reader transceiver device and a system
  • An RFID card reader transceiver device and a system

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Embodiment Construction

[0024] The implementation of the present invention is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0025]It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper", "lowe...

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Abstract

An RFID card reader transceiver device and system are disclosed. The reader chip is provided with a differential transmitting node TX1, a differential transmitting node TX2 and a receiving node RX. The receiving end of the receiving node RX is connected with a resistor RRX. The input end of the resistor RRX is connected with a capacitor CRX through a VComb terminal. N and the capacitor CRX_p, theoutput of the capacitor CRX_n and the capacitor CRX_p converge to the VComb terminal. A card reader chip in the transceiver system is provided with a transmitter and a receiver, The transmitter is connected with a differential power amplifier, the differential power amplifier is connected with a matching network unit, the matching network unit is connected with a carrier cancellation mixer and a radio frequency antenna, the carrier cancellation mixer is connected with a baseband filter, the baseband filter is connected with a receiver, and the baseband filter transmits the noise filtered datato the receiver. The invention reduces the carrier ripple interference, balances the output and the receiving load, and improves the sensitivity of the receiver.

Description

technical field [0001] The invention relates to the technical field of near-field communication, in particular to an RFID card reader transceiver device and system. Background technique [0002] RFID (Radio Frequency Identification) is the English abbreviation of Radio Frequency Identification. Generally speaking, an RFID card reader is an automatic identification device that can read electronic tag data. According to the frequency of reading tags, it can be divided into low-frequency, high-frequency, and ultra-high-frequency card readers. The RFID card reader needs to be used together with the RFID antenna to read the tag information. As a non-contact automatic identification technology, RFID radio frequency identification automatically identifies target objects and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology can identify high-speed moving ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10G06K17/00H04W4/80H04B1/40
CPCH04B1/40H04W4/80G06K7/10316G06K17/0029Y02D30/70
Inventor 丁天威
Owner 丁天威
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