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. 13, 1995
Filed:
Sep. 03, 1993
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364788 ;
Abstract
A carry look ahead circuit includes a first circuit for generating a logical sum of inputs, a second circuit for generating a logical product of the inputs, and a selection circuit for selecting either one of an output of the first circuit and an output of the second circuit in accordance with a carry signal from a lower figure to produce the selected output as a carry signal. Consequently, the number of circuit elements can be reduced greatly to configure the high speed and low power consumption carry look ahead circuit.