公开(公告)号：WO2012068258A3

公开(公告)日：2012-05-24

申请号：PCT/US2011/061007

申请日：2011-11-16

Applicant: RF MICRO DEVICES, INC.

Inventor： KHLAT, Nadim ,  MYARA, David ,  RAFIN, Jérémie

IPC: G06F7/552

Abstract: Disclosed is a coordinate rotation digital computer (CORDIC) having a maximum value circuit that selects a larger of the first component or the second component. A minimum value circuit selects a minimum operand that is a smaller one of the first component or the second component. Also included are N rotator stages, each corresponding to a unique one of N predetermined vectors, each of the N rotator stages having a first multiply circuit to multiply the maximum operand by a cosine coefficient of a predetermined vector to output a first rotation component, a second multiply circuit for multiplying the minimum operand by a sine coefficient of the predetermined vector to output a second rotation component, and an adder circuit for adding the first rotation component to the second rotation component to output one of N results, and a maximum value circuit for outputting a maximum one of the N results.