A New Technique of Mapping from Phase to Amplitude in Direct Digital Frequency Synthesizer
Zhang Yu · Beijing Youdian Xueyuan xuebao · 2003
A new technique of mapping from phase to sine amplitudes in direct digital frequency synthesizer (DDS) is presented in this paper. Through using parabolic approximation and linear approximation together, sine function signal is approximated with highly accuracy. The generated sine function signal with the maximum harmonic level of 567 dB can be used directly in many situations. With the aid of few ROM the accuracy of the generated sine function signal can be improved even more.