摘要
This paper presents a low voltage, low power RF/analog front-end circuit for passive ultra high frequency （UHF） radio frequency identification （RFID） tags. Temperature compensation is achieved by a reference generator using sub-threshold techniques. The chip maintains a steady system clock in a temperature range from - 40 to 100℃. Some novel building blocks are developed to save system power consumption,including a zero static current power-on reset circuit and a voltage regulator. The RF/analog front-end circuit is implemented with digital base-band and EEPROM to construct a whole tag chip in 0. 18μm CMOS EEPROM technology without Schottcky diodes. Measured results show that the chip has a minimum supply voltage requirement of 0.75V. At this voltage, the total current consumption of the RF/analog frontend circuit is 4.6μA.
提出了一种适用于无源超高频射频识别标签的低电压低功耗射频/模拟前端电路.通过引入一个使用亚阈值技术的基准源,电路实现了温度补偿,从而使得系统时钟在-40～100℃的范围内保持稳定.在模块设计中,提出了一些新的电路结构来降低系统功耗,其中包括一种零静态功耗的上电复位电路和一种新的稳压电路.该射频/模拟前端电路采用不带肖特基二极管0.18μm CMOS EEPROM工艺流片实现,它与数字基带、EEPROM一起实现了一个完整的标签芯片.测试结果表明,该芯片的最低电源电压要求为0.75V.在该最低电压下,射频/模拟前端电路的总电流为4.6μA.
基金
国家高技术研究发展计划资助项目(批准号:2005AA1Z1300)~~
