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. 22, 2000
Filed:
May. 14, 1998
David Terrence Matheny, Austin, TX (US);
ARM Limited, Cambridge, GB;
Abstract
An iterative division and/or iterative square root circuit 20 uses quotient digits q.sub.j+1 within the calculation that are dependent upon the input divisor D or radicand A and current partial remainder or partial radicand P.sub.j for the cycle reached. As the input divisor D or radicand A is fixed throughout the calculation, the critical path through the iterative circuit may be speeded up by preselecting and storing a subset QC of quotient digit values using a primary quotient digit selecting circuit 18, 22 operating in dependence upon the divisor D or radicand A and independently of the partial remainder or partial radicand P.sub.j. Within the iterative circuit 20, the quotient digits q.sub.j+1 to be used for each cycle can then be selected from this subset QC by a secondary quotient digit selecting circuit 24 in dependence upon the partial remainder or partial radicand P.sub.j and independent of the divisor D or radicand A.