Multiplication circuit

摘要

The multiplication circuit according to the subject of the invention is a position multiplication circuit, which processes binary coded decimal digits, and forms the product 9 . 9 = 81 at maximum. In the normal case, the product consists of two partial products, which are added together in a suitable adder circuit. The main partial product equals the number of 5 . 1 basic partial products times 5. The number of 5 . 1 basic partial products is supplied by the special adder circuit (5), which has a specially triggered fives input. The output number of circuit (5) is multiplied by 5 in circuit (1). The additional partial product is supplied by a residual fixed value circuit (2), which supplies the residual product 4 . 4 = 16 at maximum. The value 5 of circuit (1) is processed in the dual half adder (7). The value 10 of circuit (3) is processed in the second adder circuit (6). <IMAGE>