本文針對返馳式電路中，開關元件切換瞬間的突波造成元件損毀現象進行探討，文中使用軟體Ｃ++建構一系統著手返馳式電路設計，此系統可輕易設計多種不同規格返馳式電路以便於比較與分析。於緩振電路(Snubber)分析部分，先將掛載於電路上的緩振電路，簡化為等效電路，並拆解為四個工作步驟，推導其方程式，再使用軟體Matlab模擬並以數值分析此等效電路，使得對於緩振電路的設計有更進一步的了解。最後提出Power IC內建緩振電路新構想，將一般外掛於切換式電路上的緩振電路積體化於IC內部，使用軟體Tsuprem模擬元件，而後載入電性分析軟體medice搭配Hspice語法模擬實現Power IC內建緩振電路。 The power components in the transient state of switching will cause voltage overshoot on the circuit that is particularly serious to the system safty. In this thesis, we use the C++ language to design flyback circuits. It will be easier to design, make compareisons between different designs, and analyze flyback circuits with different specifications by using a computer program. In the analysis of snubber circuit, we simplify the complicated circuit to a equivalent circuit. Then, we use four work steps to derive the equations. Finally, we use Matlab language to perform numerical analyses on the snubber circuit, more understanding about how to control V_d (MAX) was obtained. At the last, we propose the idea of snubber built-in Power IC, and using T-suprem to simulate the device process. Then use Medice to load the devices for circuit simulation, and finally we get the results as expected.
