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:
Nov. 22, 1983
Filed:
Jul. 14, 1981
Applicant:
Inventor:
David W Best, Marion, IA (US);
Assignee:
Rockwell International Corporation, El Segundo, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364716 ; 364785 ;
Abstract
Apparatus is presented for logically combining two input signals in parallel operations to provide AND and OR as well as Exclusive OR outputs as part of the ALU function in a digital computer. The carry function is used in combination with the already generated signals of AND, OR and Exclusive OR to provide a carry output signal and a SUM signal through logic combining techniques. Thus, the entire ALU output is obtained in two stages of time delay and a great savings in components. In some computers, the outputs need to be passed through a four to one multiplexer to select the desired output.