Distant contactless IC card read/write implement and method therefor

Abstract

This invention relates to one remote non-contact IC read card tool and its method, wherein, the device comprises the following parts: base band data process unit, micro controller, PLL frequency integration super high frequency signal circuit module, power control circuit unit, emission power amplifying unit and base band signal process circuit, wherein, the base band data process unit is of FPGA base band process unit composed of front and back link to realize read card communication agreement and frame process and system time sequence control. This invention progress adopts FPGA chip by use of inner programmable logic materials.

Description

technical field [0001] The invention relates to a long-distance non-contact IC card reading and writing machine and its method, in particular to a long-distance non-contact IC card reading and writing machine and its method for UHF frequency band (902MHz~928MHz). It is used together with the read and write antenna. Background technique [0002] At present, long-distance contactless card readers such as figure 1 As shown, it is generally composed of a power supply unit, a baseband data processing unit, a status indication unit, an RS232 communication interface, a microcontroller, a PLL frequency synthesis UHF signal circuit module, a power control circuit unit, a transmission power amplifier circuit unit, and a baseband signal processing unit. circuit (including signal amplification and ASK modulation and demodulation), mixing circuit and directional coupler. Among them, the baseband data processing unit is composed of a codec chip, which completes the encoding and decoding...

AI Technical Summary

Problems solved by technology

[0005] 1. The circuit is complex, poor stability, and low reliability: due to the use of too many ICs to form functional unit circuits, the circuit system is complicated and brings difficulties to circuit debugging and testing, so the product design cycle is generally longer

[0006] 2. The cost of system implementation is relatively high: currently, the price of special-purpose ICs is relatively expensive, and too many special-purpose ICs are used in the system, which significantly increases the design cost of the system

[0007] 3. Difficulty in system upgrade and update: At present, the speed of technology update is too fast, and users have higher and higher requirements for the system.

However, too many dedicated chips are used in the system, so that the upgrade of the system must change the entire hardware design scheme.

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