The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1992
Filed:
Apr. 29, 1991
Creighton S Asato, Sunnyvale, CA (US);
Christoph Ditzen, San Jose, CA (US);
VLSI Technology, Inc., San Jose, CA (US);
Abstract
A conditional-sum carry structure has an architecture which is sufficiently regular that the structure can be conveniently generated by an automated compiler. The carry structure includes a column of input cells, each of the cells in the column being operative for receiving binary numbers and, for each of the received numbers, generating a sum bit and two carry-out bits. Further the carry structure includes an array of columns of binary logic elements comprised of dual multiplexers (MUX MUX elements), dual exclusive OR gates (XOR XOR elements), multiplexer and exclusive OR gate circuits (MUX XOR elements) and multiplexer units (ONE MUX elements) for receiving sum bits and carry-out bits from the input cells and for performing the operations of a conditional-sum carry structure.