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:
Apr. 02, 1996
Filed:
Aug. 05, 1993
Leonard D Rarick, San Marcos, CA (US);
Hyundai Electronics America, San Jose, CA (US);
Abstract
A carry-save adder for use in a binary multiplier with a reduced number of full adder stages. The carry-save adder is for summing columns of binary data and is implemented with a plurality of one-bit and two-bit full adders. The one-bit and two-bit full adders are configured in a plurality of interconnected modified Wallace-Tree adders, each modified Wallace-Tree adder for summing binary data bits from one or more columns and generating a partial sum and a partial carry. Each modified Wallace-Tree adder has a plurality of stages comprising a combination of one-bit and two-bit full adders for reducing the number of the binary data bits, the last stage comprising a single one-bit full adder for generating the partial sum and partial carry results. A plurality of conductors interconnects the stages of each modified Wallace-Tree adder with stages in the same modified Wallace-Tree adder and with stages in other modified Wallace-Tree adders.