A memory-efficient and high-speed sine/cosine generator based on parallel CORDIC rotations

The sine/cosine function generator is based on parallelization of the original CORDIC algorithm by predicting all the rotation directions directly from the binary bits of the initial input angle. Unlike previous approaches that require complicated circuits or exponentially increased ROM, our proposed architecture has a relatively simple prediction scheme through an efficient angle recoding. The critical path delay is also reduced by utilizing the predicted rotation directions to design an efficient multioperand carry-save addition structure.