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:
Jun. 06, 2000
Filed:
Jun. 19, 1998
Stephen C Purcell, Mountain View, CA (US);
Nital P Patwa, San Jose, CA (US);
ATI International SRL, , BB;
Abstract
A multiplier is configured to multiply two signed values to generate sum and carry bit groups representing, in redundant form, a product of the first and second signed values. A sign determining circuit is configured generate a sign bit representing a sign of the product. An extension unit is configured to receive the sum most significant bit, the sign bit, and the carry most significant bit. The extension output terminal configured to carry a replacement bit and an extension bit, the replacement bit having a same weight as the sum most significant bit. The extension unit is structured such that the replacement bit has one binary state only if the sum most significant bit and the carry most significant bit are different. The extension unit is structured such that the extension bit has one binary state only if the sign bit is a binary zero and the sum most significant bit and the carry most significant bit are the same.