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:
Nov. 05, 2002
Filed:
Sep. 17, 1999
Yair Aizenberg, Tinton Falls, NJ (US);
Daniel Amrany, Ocean Township, NJ (US);
Yue-Peng Zheng, Ocean Township, NJ (US);
GlobespanVirata, Inc., Red Bank, NJ (US);
Abstract
A process circuit is disclosed for computing a fast Fourier transform (FFT). In one embodiment, the processing circuit includes a memory device, a multiplier, a detector, a state machine, and a circuit for performing the 2's compliment of a coefficient. The memory storage device stores data values and coefficient (or twiddle) values. The detector integrates a date pointer with the state machine. The detector is designed to identify the symmetry lines (by memory address). The state machine, when notified by the detector that a line of symmetry has been encountered, appropriately adjusts either the coefficients, the imaginary sign, or the real sign for input to a multiplier.