编码锁存器由主持人（start）控制以及 6 名选手输入（xuanshou（6:0））。主持 人信号无效（‘1’）时，将中间变量 Q_Z‘0’赋‘1’，主持人信号有效（‘0’）之后，如果中间 变量 Q_Z‘0’ 为‘1’，这时候 存下选手号的七段码显示，并将中间变量 Q_Z‘0’ 赋值为‘0’，使 下一个选手抢答信号输入无效，达到锁存的效果。最后给抢中输出（q）赋‘0’，表示已经 有选手抢中。-Encoding latch is controlled by the host (start) and 6 the the players input (xuanshou (6:0)). Moderator signal is invalid (' 1 ' ), the intermediate variables Q_Z' 0'　Fu ' 1 ' , the host signal (' 0' ), if the intermediate variables Q_Z' 0 ' to ' 1' , this time able to save contestant number seven segment display, and the intermediate variables Q_Z' 0 ' assigned to ' 0' , so that the next player to answer in invalid signal input to achieve the effect of the latch. Finally, to grab in the output (q) endowed ' 0 ' , players grab in.