CORDIC (Coordinate Rotation Digital Computer) can be an efficient vector rotation algorithm in the design of integrated circuit.Many researches focus on the reduction of iteration times

and to expand the scope of the convergence and reduce the cost of scaling factor compensation.This paper presents a double-step scaling-free CORDIC algorithm which uses two-step rotation strategies.The algorithm reduces the iteration times

and extends the convergence range to the entire circumference.The experiments show that the algorithm has excellent performance in terms of calculation accuracy

iteration times

and the area consumption.