Design And Implementation Of Label Chip Baseband Based On The Autonomous Communication Protocol For Resonant Sensing Circuits

Ultrahigh Frequency Radio Frequency Identification(UHF RFID)technology has the advantages of low power consumption,fast speed,long distance and other technical advantages and the sensing parameters of the sensing technology can be accurately converted into digital monitoring values.They can form the underlying technology foundation of the Internet of Things,realize end-to-end,end-to-cloud connectivity,and build a smart world of Internet of Everything.The power monitoring industry is one of the application scenarios combining UHF RFID technology and sensing technology.The magnetic induction resonant sensing circuit is combined with the UHF RFID passive tag chip to form a sensing tag,which is adapted to the querier and other devices to build a passive and wireless monitoring system for grid stability,which can realize on-line monitoring of current and voltage to ensure grid equipment.Safe operation,reduce monitoring costs and improve monitoring efficiency.The main research focus of this system is the design and implementation of the tag chip baseband for resonant sensing circuits.The research content and research results completed in this paper are as follows:(1)According to the interaction process between the querier and the sensor tag,this paper determines that the passive sensor communication air interface protocol is compatible with the codec method of the forward link and reverse link of the national standard protocol,and define the command frame format parameters in the interaction process,and realize the support of the protocol for air interface ID matching and sensing data reading.Based on the passive sensor communication air interface protocol,this paper presents the design function,architecture and module division of the sensor tag digital baseband,completes the low-power RTL design of the digital baseband sub-modules and the top-level module,and uses NC-Verilog for digital Baseband function verification.This paper analyzes and designs an improved magnetic induction resonant sensing circuit.Through the interface logic design of digital baseband,it ensures that the digital baseband can correctly return the sensing frequency data to the querier if there is a certain clock precision deviation on the basis of the protocol requirements and design functions.(2)This paper uses Design Compiler for digital baseband for comprehensive optimization and Encounter for physical implementation.At the same time,PT and PTPX are used to perform timing power analysis on digital baseband layout circuit,complete digital baseband from RTL level code to gate level netlist,and then complete the GDSII file.The integrated area of the digital baseband is 43110.14412?m~2,and the power consumption of the PTPX analysis is 31.2?W.In this paper,the digital baseband is combined with the RF/analog front-end circuit to form a complete tag chip,which is delivered to SMIC for the 0.18?m tape-out process.(3)This paper combines the tag chip and the magnetic induction resonant sensing circuit to form the sensing tag,adapt the querier and other equipment,and build a passive and wireless system model for monitoring the stability of the grid.In this paper,according to the function and protocol requirements,the digital baseband design and implementation for the resonant sensing circuit are verified.At the same time,the system link parameters are calculated and tested,and the functional verification of the passive and wireless monitoring grid stability system model is completed.Through the test and verification of the interactive communication process between the querier and the sensor tag,it is proved that the baseband of the autonomous communication protocol tag chip for the resonant sensing circuit designed and implemented in this paper works normally and meets the expected goal.The function of the system model for passive and wireless monitoring of grid stability is correct,and meets design requirements.