Low latency & high precision CORDIC architecture using improved parallel angle recoding

CORDIC stands for Co-Ordinate Rotation Digital Computer. CORDIC play a major role in the calculation of the hyperbolic and trigonometric functions. CORDIC algorithm is used to evolution of wide Varity of elementary functions. The designing of CORDIC in terms of precision, number of comparisons and speed simultaneously has become a challenging problem. But its implementation in hardware requires a large increase in the cycle time. The PAR has the advantage that all the angle constants are found in parallel, in a single step, by testing only the initial rotation angle, without having to perform successive CORDIC iterations. The parallel angle recoding technique can reduce the cycle time, latency and number of comparisons in the CORDIC algorithm. This paper presents a improved PAR of CORDIC with reduced latency from 10 cycles to 7 cycles and error of the CORDIC is reduced 15% without any significant penalty on the power and area.