A new type of low power read circuit in EEPROM for UHF RFID |
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Authors: | Yongqian Du Xiaoming Li Li Dai Xin Jing Zhenrong Li Hualian Tang Yiqi Zhuang |
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Affiliation: | Xidian University, Room 503 Xinkeji Building, no.2 Taibai South Road, Xi''an, Shaanxi 710071, PR China |
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Abstract: | A novel low power read circuit without reference in 1 k-bits electrically erasable and programmable (EEPROM) for UHF RFID is designed and implemented in SMIC 0.18 μm EEPROM process. The read power consumption is optimized using a pre-charge sense amplifier. To improve the performance of the read circuit, a self-detect circuit, a read control logic and a feedback scheme are adopted, combined with a special time sequence. For a power supply voltage of 1 V, an average power consumption of 1.6 μA for the read operation of the EEPROM can be achieved when the read clock frequency is 640 kHz. What is more, with a 110 °C temperature change, the read power consumption variation is as low as 12%. The die size of the EEPROM is 0.15 mm2, where the read circuit occupies 0.0125 mm2. |
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