Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2006-08-01
2006-08-01
Malzahn, D. H. (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
C708S709000
Reexamination Certificate
active
07085797
ABSTRACT:
An addition circuit for producing a sum of four redundant binary numbers includes a 4:2 compression adder for receiving each of the operand fields of the four redundant binary numbers, and producing a first sum field and a first carry field therefrom. The addition circuit further includes a 4:3 compression adder for receiving each of the sparse carry-save fields of the four redundant binary numbers, and producing a second sum field therefrom. The addition circuit also includes a 3:2 compression adder for receiving the first sum field, the first carry field and the second sum field, and producing a third sum field and a second carry field therefrom. The third sum field and the second carry field are the final results from addition of the four redundant binary numbers.
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Broadcom Corporation
Malzahn D. H.
Sterne Kessler Goldstein & Fox PLLC
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