Design Of Baseband-processor For Implantable Glucose-sensor Tag

Wireless implantable glucose-sensor tag is a promising wearable device for continuous glucose monitoring. An implantable sensor tag system consists of three parts:1) a sensor-data acquisition module including a signal detection circuit and sensor readout circuit; 2) a digital baseband; and 3) a radio frequency (RF) front-end using for communication with the reader outside of the body. The digital baseband is a key part of the monitoring tag system. It processes high frequency (HF) communication protocol, controls communication flow, and configures RF front-end and the analog digital convertor (ADC).This work designs and implements a low-power digital baseband processor for a wireless implantable glucose-sensor tag. Based on the analysis of the ISO 15693 protocol and application requirement, this work makes a design specification and a communication flow with the reader, as well as the system architecture. The pulse position modulation decoding module supports both 100% and 10% ASK signal, and baseband controls operation mode and status by commands decode module and control unit. After sending Manchester encoding response, baseband switches into sensor control state, In this state, the baseband can configure the ADC circuit and store ADC data to the memory of the implantable sensor tag.The functions of the system have been verified with an FPGA prototype. The baseband is implemented and taped out using SMIC 0.13 CMOS process technology. The post simulation results show that the digital baseband meets design requirements, and static timing analysis results show that the design meets the timing check. The area of the design is 0.16mm×0.16mm, and the power consumption is 5.14μW.