一、引言众所周知,用于功率开关目的的半导体器件,通常有两类:双极型和MOS型。它们各有其优点和不足:双极功率开关器件优点是电流容量大,开态电阻低,缺点是输入阻抗低;MOS功率器件的最大优点是输入阻抗高,工作速度快,缺点是开态电阻大,电流容量小。长期以来,人们一直试图制造出一种具有高输 I. INTRODUCTION As we all know, there are two types of semiconductor devices used for power switch purpose: bipolar and MOS type. They have their own advantages and disadvantages: bipolar power switching device has the advantages of large current capacity, low on-resistance, the disadvantage is that the input impedance is low; MOS power device maximum advantage of high input impedance, fast speed, the disadvantage is the open-state resistance Large, small current capacity. For a long time, people have been trying to create a high-lose