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:
May. 03, 1988
Filed:
Mar. 25, 1985
Kevin L Kloker, Arlington Heights, IL (US);
Miles P Posen, Chicago, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A modulo arithmetic unit for providing a sum or difference of two numbers of arbitrary value in a selected one of a plurality of moduli is provided. Each modulus has a lower and an upper boundary and a range of intermediate values. First and second adders are provided for respectively providing first and second outputs which respectively represent outputs compensated for and not compensated for a possible wraparound of the upper or lower boundary. Control circuitry is used to detect whether a wraparound occurred during the calculation depending upon the value of selective interstage carry signals of the first and second adders. The correct output is provided as a selected one of the outputs of the first and second adders in response to the control circuitry.