多功能具迴授控制驅動電路設計應用於光療與電療治療儀系統

本論文主要研究多功能具迴授控制驅動電路設計應用於光療與微電療治療儀系統，是整合了光治療與微電流電療的多功能治療儀。其中包括LCD元件、開關選擇、定電流電路，並規劃PIC為處理器當控制系統。構成一個光、電整合的多功能治療儀，應用於醫學治療上。本文首先會介紹光、電(包括微電療)之治療發展，並提出完整的系統架構與原理概述。再針對系統架構中的電路做解釋，如:定電流電路的設計以及解釋如何消除放大器的偏移電壓…等。我們LED在頻率100HZ、電流80mA和責任週期 (duty cycle) 6%時可以得到效率比較好(亦斜率較高且近線性)的輸出且紅藍綠光在此輸入條件下的功率分別為12.34mW/cm2、11.92 mW/cm2、7 mW/cm2.，經計算後可符合文獻的需求；微電流電療可以在電流1mA下治療，在頻率100Hz而duty cycle為6%之下而模擬人體電阻為10kΩ此功率為10mW，也可符合文獻的需求，讓光電療治療效果有依據。

關鍵字

微電流電療；光電驅動電路；人體電阻

並列摘要

This thesis presents a multi-function driving circuit design with feedback control for phototherapy and electrical stimulation system. It is an all-in-one therapeutic instrument. It includes LCD component, switch circuit and constant current driving circuit. It has been designed by PIC to make up a multi-functional therapy system with light and electrical stimulation for medical application. This text will recommend the treatment of the light and electrical stimulation( micro current electrical stimulation ) to develop at first and overall system structure and theory secondly. Then, we have explained the sub circuit in the system structure, for instance: the driving circuit design and how to reject the offset voltage of op Amp. The phototherapy which is red, blue and green light has different power (under the frequency= 100Hz, duty cycle= 6% and current= 100mA) 12.34mW/cm2, 11.92 mW/cm2, 7 mW/cm2. separately. In this condition(frequency= 100Hz, duty cycle= 6% and current= 100mA ), we can find the better efficiency. After calculation, it can reach the record in the other paper. Micro-current electrical stimulation works at different constant current under frequency= 100Hz and we can find the better linearity at various loading resistance.