臺灣博碩士論文加值系統

本篇論文使用TSMC 0.25-μm HV mixed signal Based BCD 2.5/5/7/12/20/24/40/45/60V的製程技術，實現雙相脈波電刺激晶片，藉以縮減傳統電刺激器中，需要透過高功率元件組成的升壓電路，所造成的龐大體積。在此電刺激器架構中，將規劃適當的架構解決消耗功率及高電壓電晶體(high-voltage MOS)的面積消耗問題，其中包含8位元高電壓數位類比轉換器，控制電刺激輸出所需之電流量，並且採用分段電流模式(segmented current mode)的結構，6位元MSBs 熱碼式及2位元 LSBs二階權狀式達到高線性度。另外，由於本篇論文使用5/30/60V做為供應電源，會使得操作在低電壓與高電壓電路之間產生線性度偏移，因此提出電壓限制技巧，用以提高電刺激器輸出值的線性度。
在電路模擬方面，將利用HSPICE進行模擬，其模擬結果顯示，陽極最大輸出電流(Ian,max)與陰極最大輸出電流(Ica,max)分別為49.98mA及50.03mA;而陽極最大的微分非線性(DNLan,max)與積分非線性誤差(INLan,max)分別為-0.12LSB及0.51LSB；陰極輸出電流最大的微分非線性(DNLca,max)與積分非線性誤差(INLca,max)分別為0.19 LSB及-0.28 LSB。另外，電刺激頻率(TP)為24.9Hz，而陽極電刺激時間(Ta)與陰極電刺激時間(Tc)分別為300.08μs及300.05μs。

This study used TSMC 0.25-um HV mixed signal Based BCD 2.5/5/7/12/20/24/40/45/60V process to implement the Biphasic Pulse Stimulation Chip ,which aimed to reduce the large volume caused by the high-power components of booster circuit in traditional electric stimulator. In this electrical stimulator architecture, a suitable structure was planed to solve the problem with power consumption and area consumption caused by high-voltage transistors. The structure contained 8-bit high-voltage digital-to-analog converter to control any intensity of output current in electrical stimulation. It also taken segmented current mode structure, 6-bit MSBs thermomeder-coded and 2-bit LSBs binary-weighted to achieve high linearity. Furthermore, since this study utlizied 5/30/60V as power supply, linearity offset may occur between low-voltage circuit and high-voltage circuit. Therefore voltage limiting technique was proposed to increase the linearity of output value from the electrical stimulator.
In circuit simulation, we apply for HSPICE to simulation. The simulation result showed that, the maximum output current of anodic(Ian,max) and cathodic(Ica,max) were 49.98mA and 50.03mA respectively. The maximum differential nonlinearity(DNLan,max) and integral nonlinearity(INLan,max) of anodic were -0.12 LSB and 0.51 LSB respectively. The maximum differential nonlinearity(DNLca,max) and integral nonlinearity(INLca,max) of cathodic were -0.19 LSB and 0.28 LSB respectively. In addition, the frequency of electrical stimulation (TP) was 24.9Hz, the stimulation duration of anodic(Ta) and cathodic(Tc) were 300.08μs and 300.05μs respectively.

中文摘要 ----------------------------------------------------------------------------- i
英文摘要 ----------------------------------------------------------------------------- ii
誌謝 ----------------------------------------------------------------------------- iii
目錄 ----------------------------------------------------------------------------- iv
表目錄 ----------------------------------------------------------------------------- vi
圖目錄 ----------------------------------------------------------------------------- vii
一、 緒論----------------------------------------------------------------------- 1
1.1 研究動機----------------------------------------------------------------- 1
1.2 電刺激-------------------------------------------------------------------- 1
1.2.1 電刺激基本原理-------------------------------------------------------- 1
1.2.2 電刺激相關應用-------------------------------------------------------- 2
1.3 研究目的----------------------------------------------------------------- 3
1.4 論文大綱----------------------------------------------------------------- 4
二、 醫療電刺激系統-------------------------------------------------------- 5
2.1 電刺激文獻回顧-------------------------------------------------------- 5
2.2 系統架構規劃----------------------------------------------------------- 5
2.3 TSMC 0.25-μm HV mixed signal Based BCD 2.5/5/7/12/20/ 24/40/45/60V 製程介紹 --------------------------------------------- 6
2.4 高電壓數位類比轉換器設計考量----------------------------------- 7
三、 高電壓電流式數位類比轉換器-------------------------------------- 9
3.1 架構簡介----------------------------------------------------------------- 9
3.2 8位元電流式數位類比轉換器部分--------------------------------- 9
3.2.1 6位元MSBs溫度計碼數位類比轉換器----------------------------- 11
3.2.2 2位元LSBs二階權重式數位類比轉換器-------------------------- 18
3.2.3 偏壓電路----------------------------------------------------------------- 20
3.2.4 8位元電流式數位類比轉換器--------------------------------------- 24
3.3 高電壓驅動電路-------------------------------------------------------- 25
3.4 高電壓電流式數位類比轉換器模擬結果-------------------------- 29
四、 雙相脈波產生器-------------------------------------------------------- 32
4.1 雙相脈波產生器簡介-------------------------------------------------- 32
4.2 雙相脈波產生器架構-------------------------------------------------- 33
4.2.1 高電壓電流鏡----------------------------------------------------------- 34
4.2.2 雙相脈波產生器之高電壓驅動電路-------------------------------- 35
4.2.3 脈波寬度控制電路----------------------------------------------------- 36
4.3 雙相脈波產生器佈局前模擬結果----------------------------------- 40
4.4 雙相脈波產生器佈局後模擬結果----------------------------------- 44
4.5 雙相脈波電刺激晶片文獻比較-------------------------------------- 47
五、 結論與未來展望-------------------------------------------------------- 49
5.1 結論----------------------------------------------------------------------- 49
5.2 未來展望----------------------------------------------------------------- 49
參考文獻 ----------------------------------------------------------------------------- 52

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