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:
Sep. 16, 1997
Filed:
May. 04, 1995
Jose G Corleto, Austin, TX (US);
Gregg S Kodra, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A circuit (10) for determining a radius value and a phase value from an in-phase signal I(n) and a quadrature signal Q(n) iteratively approximates the phase value and the radius value based upon initial in-phase signal and quadrature signal preferably using the coordinate rotational digital computer (CORDIC) algorithm. The circuit (10) includes a multi-task arithmetic unit (50), memory (20), and a controller (30). The multi-task arithmetic unit includes registers (12, 14, 16), multiplexers (18, 22), shift registers (24, 25), and an adder (26) to perform various arithmetic operations. The circuit (10) further includes dynamic memory (32) for storing the solutions at different points in time of the radius value and phase value, which are subsequently used in the filtering of radius values and phase values.