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. 29, 1991
Filed:
Oct. 27, 1988
William F Gardei, Downingtown, PA (US);
Commodore Business Machines, Inc., West Chester, PA (US);
Abstract
A fast logic gate wherein the gate output assumes a first binary state when two or more of the gate inputs assume the same predetermined binary states and wherein the gate output assumes a second binary state otherwise. The delay in propagating the gate output based on a transition at a predetermined one of the gate inputs is relatively small. In a preferred application, the gate is utilized in a microprocessor ALU, more particularly, the portion of each adder bit which generates the carry output, and the predetermined gate input is the carry input of the adder bit. The microprocessor can therefore execute instructions which involve addition or subtraction operations, such as relatively addressing instructions, much more quickily.