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:
Oct. 15, 1985
Filed:
Jan. 11, 1982
George W McIver, Redondo Beach, CA (US);
Barry H Whalen, Rancho Palos Verdes, CA (US);
Bruce L Troutman, Irvine, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
A fast Fourier transform circuit formed on a single chip, including a fast multiplier-accumulator circuit which, in the preferred embodiment, employs a modified form of Booth's algorithm, an adder circuit, a read-only memory for storing FFT twiddle factors, and a random access memory for holding a set of input complex quantities and for receiving intermediate and final results in an in-place FFT operation. In the preferred embodiment, the FFT twiddle factors are stored in Booth's code for greater speed of operation. Control and timing circuitry on the same chip generates control signals and address codes in order to perform a sequence of butterfly computations by repeated use of the multiplier-accumulator and adder circuits, to generate FFT coefficients in the random access memory.