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:
Aug. 20, 2002
Filed:
Sep. 20, 1999
Curtis Abbott, Menlo Park, CA (US);
PMC-Sierra, Inc., Burnaby, CA;
Abstract
A method and apparatus for a sums of products datapath. According to one embodiment of the invention, an apparatus has a number of inputs and a number generation units. Each of the generation units is coupled to the inputs. Each of the generation units includes a separate selection circuit coupled to each one of the inputs to selectively pass the signal provided on that input. In addition, each of the generation units includes a number of reduction circuits having inputs coupled to mutually exclusive pluralities of the selection circuits and each having an output. The apparatus also includes a first and second summation circuit coupled to the output of the plurality of reduction circuits in mutually exclusive pluralities of generation units. Additionally, the apparatus includes a subtraction circuit coupled to an output of the first and second summation circuit.