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. 19, 1992
Filed:
Feb. 05, 1991
Applicant:
Inventors:
Henry M Darley, Plano, TX (US);
Jeffrey A Niehaus, Dallas, TX (US);
Kevin M Ovens, Garland, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364754 ; 3647462 ;
Abstract
A multiplying circuit (10) receives a multiplicand A and multiplies it by multiplier B. An Octal recoder (18) recodes the multiplier B into octal digits having a value from 4 to -4. A tripling generator determines the product of three times the multipicand. Partial product generators (22a-h) connected to the Octal recoder multiplex between the multiplicand A and the 3*A product, and include shifter and inverter circuitry to generate the partial products. Signed digit adders (24a-d, 26a-b and 28) add the partial products.