Design And Physical Implementation Of Baseband For UHF RFID Chip Base On GB Protocol

The passive UHF RFID tag is cheaper and less power dissipation than the active tag, as thepower dissipation decrease of tag chip, the improvement of antenna and the development ofair interface protocol, the UHF RFID tag performance improved gradually, it have been re-placing active tag in some area. To the HF&LF tag, it has a faster speed of data spreading anda longer distance to communicate, it will gradually replace the HF&LF tag as the technologyimproved and power dissipation reduced.In this paper, research of the design and implementation of baseband for passive UHFRFID chip according to the Information technology-Radio frequency identification Air inter-face protocol at800/900MHz of our country. Based on the analysis of structure of the passivetag, GB protocol and the pivotal consideration of baseband, we proposed an ideal that tomonish area of baseband by structure optimization, code optimization. Use PMU module,logic optimization, parallel CRC calculation, operand-isolation, clock gating to reduce powerconsumption, increase the communication distance. Use Verilog HDL to design the basebandand do functional simulation. The baseband was synthesized and implemented based onSMIC0.18μm technology, use Design Compiler to do logic synthesis; use Astro to do physicdesign; at the verification stage, use Prime Time to do static timing analysis; use Calibre to dolayout verification, such as DRC&LVS, etc.The results show that, the baseband function were designed correctly, support all the man-datory command, included Query, Access, Kill, Lock, Read, Write, etc. The area of basebandis80735.054688μm2, about8090gates, effective in reducing baseband area. These in favorof the decrease of power dissipation and cost, which increases the cost-effective of tag chip.