- 學位論文
運用於磁通閘感測元件之二次諧波偵測驅動電路設計與分析
Design and Analysis of Second-Harmonic-Detection Driving Circuits for Fluxgate Sensors
摘要
本論文研究提出了以類比式移相器為核心作為相位調整之二次諧波偵測驅動電路，此類比式移相器之相位調整採用外接手調式可變電阻作為媒介，藉由可變電阻阻值大小之改變以達到所需之相位角度，其電路系統架構分為激發與感應訊號電路，透過二次諧波偵測驅動電路，能偵測磁通閘之磁芯非線性之磁滯曲線受到外磁場影響而產生的偏移，得到正比於外加磁場的輸出電壓。針對磁通閘感測元件提出了3V CMOS驅動電路之設計，利用CMOS積體電路電子元件之訊號快速處理、面積小且製程穩定之特性，建構出磁通閘感測元件之驅動電路晶片，使得磁通閘整體設計更趨於實際與商品化，提高在磁場量測技術方面上更多應用之可能性。使用美商Avant!所提供之Hspice積體電路模擬軟體來進行模擬電路特性，及採用國家晶片設計中心(CIC)所提供之TSMC 0.35μm 2P4M CMOS製程技術之元件參數與設計規則為主要之設計依據，完成3V CMOS驅動電路之晶片實際模擬佈局設計與下線。
並列摘要
This paper presents second-harmonic-detection driving circuit uses analog phase-shifter to as a phase adjustment, the phase adjustment of analog phase-shifter adopts external hand tuning variable resistor, by the change in the size of the variable resistor in order to achieve the desired phase angle. The system architecture of the circuit is divided into excitation and sensing signal circuits, through second-harmonic-detection driving circuit, that can detection the nonlinear hysteresis curve of fluxgate core offset by the impact of the external magnetic field, obtain the output voltage is proportional to the applied magnetic field. For fluxgate sensor proposed 3V CMOS driving circuit design, use signal processed quickly of CMOS integrated circuit electronic components, the characteristics of the small size and the stability of the process, construct fluxgate sensor driving circuit chip, makes the fluxgate overall design tends to be more practical and commercialization, increase the possibility of more application of the magnetic field measurement technology. Use Avant! provided the Hspice integrated circuit simulation software to imitate circuit characteristics, and apply National Chip Design Center (CIC) provided TSMC 0.35μm 2P4M CMOS process technology component parameters and design rules for the design basis, complete 3V CMOS driving circuit chip the actual analog layout design and tapeout.