| 摘要 |
<p>An adder (150) of four inputs and two outputs is a circuit for deriving CARRY and SUM satisfying in0 + in1 + in2 + in3 + cin = 2cout + 2CARRY + SUM, where in0, in1, in2, in3 are the first to fourth inputs, cin is the intermediate carry from the preceding digit and cout is the intermediaty carry to the next digit. Cout is calculated only from (in0,in1,in2,in3) and will not be influenced by cin. The adder (150) is to be employed in an intermediate sum generating circuit (310,320,...,400) of a multiplier. <IMAGE></p> |
