中文摘要
本文提出適用於馬達系統之低成本，高速磁感測器。此磁感測器，包含訊號調節放大器，霍爾元件，霍爾偏壓電路皆整合於單晶之積體電路。霍爾元件設計採用標準CMOS製程組成，為一單積體電路平版，相較傳統特殊製程多組平版，本設計具高成本效益。訊號調節放大器設計採用chopping技術以重整雜訊並濾除偏移誤差，設計採用電流式回授提升操作速度。霍爾偏壓電路設計導入改良式spin current技術，具傳統之spin current效能並同時結合訊號調變效果，簡化前饋路徑設計並移除訊號路徑之低頻極點。提出之磁感測器具有極微小之偏移電壓(<11 nT)，感測速度可操作大於400 kHz頻寬之應用，相較優於現有商用產品速度5倍以上，面積節省220%以上。
Abstract
A low cost, high speed Hall sensor for motor application is presented. The Hall sensor, its signal conditioning amplifier, Hall plate and Hall biasing circuit are fully integrated in a single chip. The Hall device is a single plate configuration made by only standard mask process for low cost feature. The signal conditioning amplifier applied the noise shaping and offset filtering by chopping technique, also designed by current-feedback approach to broaden its operational speed. The Hall biasing circuit designed by proposed signal-chopped spinning current method (sc-spinning current) to combine spinning current and chopping signal into Hall biasing circuit, which ease feed-forward path design and decrease the poles in signal path. The Hall sensor has typical offset of 11 nT. The sensing speed can operate more than 400 kHz operation bandwidth. Compare to commercial products, the sensing speed of this design is improved at least five times faster and reduce chip area at least 220%.
關鍵詞(Key Words)
霍爾元件 (Hall)
電流旋轉 (spin current)
電流式回授 (current feedback)
相關檔案: 具低成本、高速電動車馬達系統之電流式磁感測器設計(全文)
