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. 12, 1992
Filed:
Oct. 29, 1990
Ying-Wai Ho, Austin, TX (US);
Peter L Harrod, Cherry Hinton, GB;
Ashok H Someshwar, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An array multiplier calculates a Sticky-Bit concurrently with an iterative multiply operation using a predetermined number of multiplier arrays. An n-bit multiplicand operand provides a continuous input for each multiplier array. An n-bit multiplier operand is divided into a number of smaller sub-operands and each sub-operand is utilized for each cycle of the multiply operation. Each multiply cycle produces an intermediate accumulated partial product represented as sum and carry data, and a portion of the final product. The intermediate accumulated partial product is used as an input to a subsequent multiplier array for the following multiply cycle. A final accumulated partial product is summed in an adder to determine a completed product. During each cycle of the multiply operation, the Sticky-Bit detection logic detects and accumulates the Sticky-Bit concurrently with the multiply operation.