数字电子技述 第四章组合悬} 4位集成数值比较器的真值表 比较输入 级联输入 输出 A:B3 A2B2 A B AoBo A<B A=B A>B FA<E FA二B > × × × × 0 0 × × 0 0 0 0 × 0 0 0 0 0 0 0 0 0 0 0 0 < × × X × 0 0 × X × 0 0 < X × × X 1 0 0 < × × X 1 0 0 级联输入:供扩展使用,一般接低位芯片的比较输出。第四章 组合逻辑电路 比 较 输 入 级 联 输 入 输 出 A3B3 A2B2 A1B1 A0B0 A<B A=B A>B FA < B FA = B FA > B > 0 0 1 = > 0 0 1 = = > 0 0 1 = = = > 0 0 1 = = = = 0 0 1 0 0 1 = = = = 0 1 0 0 1 0 = = = = 1 0 0 1 0 0 < 1 0 0 = < 1 0 0 = = < 1 0 0 = = = < 1 0 0 4 位集成数值比较器的真值表 级联输入:供扩展使用,一般接低位芯片的比较输出