二、典型应用电路 1.比例加法运算电路比例加法运算电路是基本应用电路之一,如图4所示。图中,高位的输出端Q_1接到低位的级联端CF_2,这就保证了前一级的输出脉冲直接送到后一级的输出端。采用这种接法,对于高位来说,由于 Second, the typical application circuit 1. Proportional addition circuit Addition circuit is one of the basic application circuit, as shown in Figure 4. In the figure, the high output terminal Q_1 is connected to the low cascade terminal CF_2, which ensures that the output pulse of the previous stage is directly sent to the output terminal of the next stage. With this connection, for the high, due