Design And Realization Of Tag Chip's Digital Part Of RFID System

RFID stands for Radio Frequency Identification, a term that describes a wireless system of identification wherein an electronic device that uses radio frequency or magnetic field variations to communicate is attached to an actionless or moving item. The two most talked-about components of an RFID system are the tag, which is the identification device attached to the item we want to track, and the reader, which is a device that can recognize the presence of RFID tags and read the information stored on them.The design of a passive ultra high frequency (UHF) RFID transponder chip is researched in this dissertation. The reserarch is based on ISO/IEC 18000-6 Type C which is a standard for air interface communications at 860-960MHz.In the begining of the paper, the RFID's history, evolution and the current development status in China and the world were introduced. Then, following the introduction of the RFID system structure and the fundamentals, the electronic tag's structure and it's keypoints to realise were analyzed in details.Following the above content, with the study about relevant standars of ISO/IEC 18000-6 Type C and the digital chip's design technology and low-power technology, the digital part's stracture design of Type C and RTL-level logic design were finished. The whole design of digital part's circuit mainly includes modules of Clock-Data recovery, decode/encode, CRC check/create, control unit (FSM), random/pseudo random number generator and memory module. After this, the system's logical function and timing restriction were verified by emulator of software.Furthermore, a novel verification development platform for passive UHF RFID transponders is presented. By using FPGA (field programable gate arry), a system develop circumentence was designed for the tag's functional verification.The test results of the chip's FPGA platform are consistent with the simulation results. The transponder IC'dagital part's system meets the requirements of the design specification. As the system was verified correct, the result gives reliable garanty for tag's back-end disign, flowing the econemize of time and cost for the RFID'tag development.