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:
Nov. 12, 2002
Filed:
Nov. 09, 1999
Fabrice Aidan, Raanana, IL;
Yoram Salant, Rosh-Haain, IL;
Mark Elnekave, Ramat-Gan, IL;
Leonid Tsukerman, Haifa, IL;
Motorola, Inc., Schaumburg, IL (US);
Abstract
A power saving device and method for either adding or subtracting a constant from an operand, by checking a logic value of a portion of the operand and deciding whether to activate a multi-bit adder or to perform the subtraction or addition by inverting a portion of the operand. The power saving device and method is especially efficient when the constant K equals 2 . Then, the n'th bit of the operand is checked and if the addition or subtraction operation can be performed by inverting the n'th bit of the operand, a result is generated by that inversion, while a multi-bit adder is disabled.