Design of an Electrochemical Sensor with Automatic Current Range Detection for Biomedical Applications

論文翻譯標題: 具自動偵測電流範圍能力之電化學生醫感測器設計
  • 余 明翰

學生論文: Master's Thesis


This thesis presents a mechanism of current sensing for biomedical applications This work can be integrated with external biomedical system and to meet the requirement of the specification by using a current mirror with an automatic current range detection circuit to increase the current sensing range A method of constant voltage current measurement is utilized and applies a current conveyor to maintain the voltage at sensor terminal Follow by a current-to-timer converter to process the current output from current mirror and transfer the sensor current into time signal Then apply a time-to-digital converter to obtain 10-bit digital code Therefore Current signal can be displayed in digital mode The overall design focuses on reducing circuit complexity effectively lessens layout area miniaturization of the whole biosensor system can be realized The proposed circuit is implemented in TSMC 0 18-μm 1P6M CMOS technology The driven clock signal of circuit is 100 MHz with a supply voltage of 1 8 V The power dissipation is approximate to 1 41 mW The measured current range achieves from 20 ?A to 1200 ?A and has good linearity with average R-squared value of 0 9986
獎項日期2014 八月 27
監督員Bin-Da Liu (Supervisor)