An Improved 512bit Eeprom IP For RFID Tag IC

Radio frequency identification (RFID) technology has been widely applied inretailing, logistics and transportation. It combines the IC technology and RFtechnology together to exchange and identify data by wireless communicationtechniques.The RFID system consists of two parts: the RFID tag and the reader. The RFIDtag has three circuit blocks, including the analog front end circuits, the digital controlcircuits and the low power memory. All the information of the tag is recorded in thememory and the operation to the chip equals to operate the memory. As the power ofthe chip is mainly consumed by the memory, the entire performance of the RFID tagstrongly depends on that of the memory. In this paper, an improved low powerembedded EEPROM IP for RFID tag is designed, and the SMIC 0.18μm embeddedEEPROM process is adopted.New circuit structures are proposed to meet the storage requirement of RFID tagby analyzing the conventional EEPROM structure. The main improvement for the IPcircuits includes timing control circuit and port voltage control circuits of the digitalcircuit, charge pump and sense amplifier of the artificial circuit. The Cadence’s EDAtool is employed to simulate the performance of the analog circuits, and the layout andits validation are realized via the Calibre software.