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:
Jan. 30, 1990
Filed:
Sep. 14, 1987
Applicant:
Inventors:
Iradj Shahriary, Santa Monica, CA (US);
George S Des Brisay, Jr, Hemet, CA (US);
Susan K Avery, Altadena, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364784 ;
Abstract
An improved cascadable adder (11) which, through the use of merged logic, provides high speed operation in the presence of input loading and internal fan-out limitations. The invention may be implemented in gallium arsenide technology and includes a first circuit (13) for exclusive ORing first bits (A.sub.1, B.sub.1) of first and second digital words (A, B) respectively; and a second circuit (37) operatively connected to the first circuit (13) for generating, with only two gate delays, a carry (C.sub.1) associated with the summing of the first bits.