A Passive UHF RFID Transponder with Novel Clock Generator

给出一种符合ISO/IEC 18000-6B协议的超低功耗的无源超高频RFID标签.为了能够给标签数字基带处理提供准确的时钟,使用了一种超低功耗、自校正的时钟产生器,产生的时钟在-50℃～120℃或者0.7～1.6 V 电源电压的范围内,偏差小于4%.此自校正时钟模块的功耗在0.7 V的电源电压下仅为364 nW.一个低压输出参考电压源也集成到了该标签芯片中,该模块产生0.96 V的基准且只消耗100 nA的电流.采用门控时钟和模块复用使功耗降低至1.17μW.该设计采用0.18μm的混合信号CMOS工艺,整个面积为0.75 mm×0.75mm.测试结果显示该标签的灵敏度达到-10 dBm.An ultra-low power passive UHF RFID transponder complying with ISO/IEC 18000-6B protocol is presented. In order to provide an accurate clock for the digital baseband processing, an ultra-low power and self-calibrated clock generator is designed and implemented in the transponder with a clock variation within 4%against temperature from -50℃ to 120℃ or supply voltage from 0.7 to 1.6 V. Total power consumption of the novel clock generator is only 364 nW with 0.7 V supply voltage. Further, a low voltage bandgap reference which generates 0.96 V with 100 nA current consumption is introduced. In digital baseband, clock gating and module reuse strategies are employed to further reduce the power consumption to 1.17 μW. This design is fabricated in 0.18μm mix-signal CMOS process with a die size of 0.75 mm×0.75 mm. Measurement results show that the proposed RFID transponder operates with a sensitivity of-10 dBm.863计划中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)03404-4104