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:
Oct. 07, 1997
Filed:
Apr. 07, 1995
Brian T Kelley, Austin, TX (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A digital signal processor having a multiplierless computation block (140) is accomplished by storing approximations of computed logarithms in memory (160, 162). When two pieces of data (114, 116) are received, the approximate logarithms, or logarithmic data (120, 128), for each of the pieces data are retrieved from memory. The logarithmic data (120, 128) is them summed to produce a resultant (136), wherein the resultant (136) is used to retrieve an inverse logarithmic approximation (180) that is stored in memory (170, 172) in a manner similar to that of the logarithmic approximations. The inverse logarithmic approximation (180) that results closely approximates the product of multiplying, or another arithmetic function, the two pieces of data (114, 116).