A Direct Digital Frequency Synthesizer based on automatic nonuniform piecewise function generation

As nowadays Direct Digital Frequency Synthesizers (DDFS) are used in a vast area of applications, the demand for simple and efficient hardware design and implementation methods is a highly important aspect. In this paper a new approach is introduced considering Automatic Nonuniform Piecewise linear function Approximation (ANPA). Automatic function generation is performed that enables quick HDL design by parameter specification in advance. For evaluation, several different configurations are simulated regarding approximation accuracy and complexity. In addition, logical and physical IC synthesis is performed for selected designs and their results are compared with actual references with respect to the common hardware constraints power, area and time.