A new type of low power read circuit in EEPROM for UHF RFID

  • Authors:

  • Yongqian Du;Xiaoming Li;Li Dai;Xin Jing;Zhenrong Li;Hualian Tang;Yiqi Zhuang

  • Affiliations:

  • Xidian University, Room 503 Xinkeji Building, no.2 Taibai South Road, Xi'an, Shaanxi 710071, PR China;Xidian University, Room 503 Xinkeji Building, no.2 Taibai South Road, Xi'an, Shaanxi 710071, PR China;Xidian University, Room 503 Xinkeji Building, no.2 Taibai South Road, Xi'an, Shaanxi 710071, PR China;Xidian University, Room 503 Xinkeji Building, no.2 Taibai South Road, Xi'an, Shaanxi 710071, PR China;Xidian University, Room 503 Xinkeji Building, no.2 Taibai South Road, Xi'an, Shaanxi 710071, PR China;Xidian University, Room 503 Xinkeji Building, no.2 Taibai South Road, Xi'an, Shaanxi 710071, PR China;Xidian University, Room 503 Xinkeji Building, no.2 Taibai South Road, Xi'an, Shaanxi 710071, PR China

  • Venue:
  • Microelectronics Journal
  • Year:
  • 2012

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Abstract

A novel low power read circuit without reference in 1k-bits electrically erasable and programmable (EEPROM) for UHF RFID is designed and implemented in SMIC 0.18@mm 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 1V, an average power consumption of 1.6@mA for the read operation of the EEPROM can be achieved when the read clock frequency is 640kHz. What is more, with a 110^oC temperature change, the read power consumption variation is as low as 12%. The die size of the EEPROM is 0.15mm^2, where the read circuit occupies 0.0125mm^2.