| 摘要 |
<p>1,079,241. Digital comparators. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. May 6, 1965 [May 7, 1964], No. 19152/64. Heading G4M. Two binary (or binary-coded decimal) numbers A, B have corresponding digits applied to comparator stages as shown, C r =1 indicates A r >B r , D r =1 indicates B r >A r and E r =1 indicates A r =B r . In the event A r #B r , E r =0 and suppresses outputs C, D of all following stages. Similar circuits using NAND instead of NOR elements can be used. A comparator in which alternate stages comprise three NAND and three NOR elements is described, this embodiment not requiring NOR4 to complement E r . The outputs C r , D r of the various stages are coupled to respective common OR gates which may be made up from NAND and NOR elements. An A=B output is obtained from the E output of the least significant stage.</p> |
