| Summary: | 碩士 === 明新科技大學 === 電子工程研究所 === 94 === Data and power are transmitted wireless through radio frequency in RFID (Radio frequency identification) system. Compared to conventional technology of magnetic card or IC card, RFID has the following advantages, such as do not need to contact with reader, hard to wear out, compact size, long life cycle, etc. That is why its development is rapid in recent years.
While the development of RFID is rapid, the privacy concern is more important. If RFID is not fully deactivate, someone could capture information contained in RFID chips; or the function of Tag is not fully disabled, it can be revivable. Therefore, we propose "Low Frequency Passive RFID with Revivable Privacy Protection Circuit" to solve the problem of privacy protection. The main component of privacy protection circuit is a switch consisted of EEPROM.
This thesis is aiming at the design of tag part in an RFID system. The carrier wave frequency is 125 kHz and working voltage is 5 V, power and data are transmitted between Reader and Tag by inductive coupling. The circuit in the transponder includes rectifier, clock generator, memory, shifter register, encoder, modulator and a revivable privacy protection circuit designed by EEPROM cell.
The functions of the circuit have been simulated and verified based on the 0.35mm 2P4M process provided by Taiwan semiconductor manufacturing company (TSMC). The area of implemented layout is 1340mm × 1265mm.
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