比较器 输入信号为s1 s2 reset clock 输出信号为sout。如果在任意4个连续时间周期中s1=s2,则sout=1，否则sout=0-The comparator input signals s1 s2 reset clock output signal sout. If in any four consecutive time period s1 = s2, then sout = 1, otherwise sout = 0