Low-stray DDS single-frequency signal generator

A low-stray DDS single-frequency signal generator comprises a first accumulator (1), a symmetry processing module (2), a second accumulator (3), an ROM table (4), a frequency division module (5) and a phase jitter device (6), wherein a certain frequency control word is accumulated through the first accumulator (1) under a reference clock, the frequency control word is used for controlling the frequency of a finally output waveform, the output of the first accumulator (1) enters the symmetry processing module (2), the symmetry processing module (2) judges the quadrant where an input value is located according to the highest two bits of the input value and obtains the input of the second accumulator (3) according to the remaining bits, a clock obtained through the frequency division module (5) drives the phase jitter device (6) to generate a jitter value, the jitter value and a value output by the symmetry processing module (2) are accumulated through the second accumulator (3), an accumulation result enters the ROM table (4) to inquire the amplitude value, the amplitude value is corrected according to the quadrant obtained by the symmetry processing module (2), and the value obtained after correction is the final amplitude value corresponding to the phase.