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. 09, 1990
Filed:
Mar. 17, 1989
Applicant:
Inventors:
Karl Knauer, Grafing, DE;
Winfried Kamp, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364784 ;
Abstract
An adder cell in which the sum signal and the carry signal are formed with equal speed is provided for employment in 'carry-save' adders, wherein the sum signal and the carry signal are separately forwarded to separate inputs of following adder cells. The circuit of the adder cell is designed such that the sum signal as well as the carry signal each have to traverse only two gates, so that the running times of sum signal and carry signal are approximately identical and shorter than the maximum running time of conventional adder cells.