臺灣博碩士論文加值系統

摘要
本論文敘述一適用於心電訊號擷取系統之單晶類比前端電路。這個系統包含第一級的儀表放大器，其應用了對共模訊號有著高度免疫力的平衡電流技術，第二級的增益放大器以及開關電容低通濾波器。為了得到理想的電路效能，論文中探討了偏移電壓等非理想效應。整個電路應用台積電0.35μm , 2p4m混合訊號互補金氧半製程實現，操作於3.3伏供應電壓。研究過程是採取全客戶設計流程，在晶片製作之前，電路經過了HSPICE的詳盡模擬。在電腦模擬下得到了如預期的良好效能。

Abstract

A monolithic analog front-end circuit for ECG acquisition system is described in this thesis. The system includes the instrumentation, which is based on the current balancing technique that ensures this type of circuit to achieve high immunity to common mode signals as first stage, gain amplifier stage and the switched capacitor low pass filter. In order to obtain good performance of the circuit, the non-ideal effect like offset voltage has been analyzed in this thesis. The circuit was implemented in TSMC 0.35μm , 2p4m mixed-signal CMOS technology and it operates at 3.3V power supply .Full custom design flow has been used in this research. Before the fabrication of chips, these circuits had simulated by HSPICE. Good agreement has been found in computer simulation performance.

目 錄
中文摘要-------------------------------------------- I
英文摘要-------------------------------------------- II
圖索引---------------------------------------------- V
表索引---------------------------------------------- VII

第一章 導論------------------------------------------ 1
1-1研究背景-------------------------------------------- 1
1-2研究動機與目的-------------------------------------- 2
1-3論文架構與流程-------------------------------------- 3
1-3-1模組電路簡介與規格-------------------------------- 4
1-3-2設計流程------------------------------------------ 5
第二章 運算放大器與傳統儀表放大器設計---------------- 6
2-1 運算放大器----------------------------------------- 6
2-2 傳統儀表放大器之子電路與架構----------------------- 7
2-2-1二級運算放大器------------------------------- 10
2-2-2 CMOS運算放大器子電路------------------------ 12
2-2-3輸入偏移電壓之推導--------------------------- 18
2-2-4頻率響應------------------------------------- 24
2-3 運算放大器設計------------------------------------ 27
2-4 模擬結果------------------------------------------ 30
2-4-1直流模擬----------------------------------------- 31
2-4-2交流模擬----------------------------------------- 33
2-4-3暫態模擬----------------------------------------- 34
2-4-4電路佈局----------------------------------------- 34
2-4-5傳統儀表放大器模擬------------------------------- 35

第三章 平衡電流儀表放大器與開關電容低通濾波器設計 38
3-1 平衡電流儀表放大器--------------------------------- 38
3-2 平衡電流儀表放大器之變形--------------------------- 40
3-3 平衡電流儀表放大器之模擬與佈局--------------------- 44
3-4 開關電容原理--------------------------------------- 46
3-5 開關電容低通濾波器之設計--------------------------- 49
3-6 開關電容低通濾波器之佈局與模擬--------------------- 52



第四章 電路測試-------------------------------------- 55
4-1運算放大器量測方法----------------------------------- 55
4-2平衡電流儀表放大器之測試結果------------------------- 61

第五章 結論與未來展望----------------------------------- 65
5-1結論------------------------------------------------- 65
5-2未來展望--------------------------------------------- 65

參考文獻------------------------------------------------ 67

參考文獻
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