[[alternative]]The study of temperature effect in integrated circuit of opto-switching device

碩士機電工程學系[[abstract]]本論文提出一光感測積體電路，透過穩定系統內部電壓與電流的方式，藉以達到穩定的光感測觸發位準，從而得到穩定之磁滯效應。整體電路可細分為光二極體、穩壓電路、電流源電路、前級放大電路、史密特觸發器與輸出級等部份。此一積體電路主要是藉由光二極體感測外部之光源訊號並將之轉換為電流，轉導型態之前級放大電路再將輸入之電流信號放大並轉換為電壓信號，具有磁滯特性的史密特觸發器根據上述之電壓信號判斷其輸出是否需要轉態，最後，輸出級將史密特觸發器之輸出結果傳送到後級之系統。而本論文所提出的系統其主要是改善內部穩壓電路與內部電流源之輸出，藉以得到穩定放大增益之前級放大器以及固定磁滯特性之史密特觸發器，以達成穩定系統磁滯特性的功能。[[abstract]]OPIC based on regulator and current bias using bandgap theorem with improved hysteresis is proposed. The whole-chip is built by photodiode, regulator circuit, current bias circuit, pre-amplifier, hysteretic comparator and driver stage. The photodiode detects the light source and transmits light signal to current signal. Pre-amplifier senses and amplifies the current signal from photodiode. Hysteretic comparator to decide the output level based on pre-amplifier output and the driver stage guarantee the output driving ability for the following system. This thesis is to control the hysteresis voltage based on voltage and temperature insensitive regulator output voltage and current bias