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:
Apr. 17, 1990
Filed:
Mar. 29, 1988
Applicant:
Inventor:
Chih C Chang, Huntingdon Valley, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364787 ;
Abstract
An apparatus for adding two binary numbers in which the computation of the sum and the carry propagation are performed in separate parts. The carry propagation passes through switches in a switch network which is controlled by a switch control. The independence of the carry propagation, switch control, carry creation and the computation makes the carry propagation faster than prior art adders without increasing the number of logic gates. The adder can be made in the form of an m bit integrated circuit which can be used as a building block to construct an adder for the addition of a larger number of bits.