| 摘要 |
PROBLEM TO BE SOLVED: To provide a sinusoidal waveform data generation apparatus capable of reducing memory capacity.SOLUTION: A processing part executes following processes in a predetermined order: a first process for reading waveform data Dw about sine wave of 1/4 cycle which is stored in advance in a waveform data memory 31 of a sinusoidal waveform data generation part 5 while counting up address data Dad from a head side; a second process for reading waveform data Dw from a tail side out of the memory 31 while counting down the address data Dad; a third process for reading waveform data Dw from a head side out of the memory 31 while counting up the address data Dad and inverting polarity of the waveform data Dw that has been read; and a fourth process for reading the waveform data Dw from a tail side out of the memory 31 while counting down the address data Dad and inverting polarity of the waveform data Dw that has been read. Thus, a sinusoidal waveform data Ds1 about sine wave of one cycle is generated. |
