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. 14, 2001
Filed:
Nov. 02, 1999
Christopher John Nicol, Red Bank, NJ (US);
Agere Systems Guardian Corp., Orlando, FL (US);
Abstract
The NEG output of the Booth encoding circuit and the multiplicand input are gated so as to minimize switching activity in the multiplier without adding any delay to the critical path thereof. Advantageously, power consumption in the multiplier is significantly reduced, e.g., on the order of 90%, when multiplication is in fact not being performed. Additionally, by changing the structure of the last XOR gate of the partial product generation circuit, the need to gate the multiplicand input can be eliminated. Advantageously, this eliminates the extra circuitry which would otherwise be required to gate the multiplicand input, thus reducing cost. Furthermore, additional power savings may be achieved by efficiently resynchronizing the multiplicand input with the Booth encoded input to the partial product circuit.