例1 光栅右边有一黑边,但工作一段时间后又消失了这个故障不同于上例,因为它工作一段时间后又可能恢复正常,这个动态过程,无源器件(上例中的L_y、C)是无法产生的,只能由有源器件产生。它产生的物理过程是,当行输出晶体管的β值下降一些,但还能保证正常激励状态时,使晶体管在工作过程中存储时 Example 1: There is a black border on the right side of the grating, but it disappears after working for a period of time. This is different from the above example because it may return to normal after working for some time. In this dynamic process, passive devices (L_y and C in the above example) Is unable to produce, can only be produced by the active device. The physical process it produces is that when the β value of the output transistor of the line drops somewhat but it also ensures that the transistor is stored during operation in the normal energized state