| 摘要 |
PURPOSE:To digitally generate accurately a switching signal by obtaining the switching signal at every arbitrarily predetermined angle of a sinusoidal wave and allowing the ON time of the pulse at that time to be proportional to the sinusoidal wave value at that time. CONSTITUTION:A counter 1 calculates the prescribed numerical value and outputs an integrated value. A sinusoidal wave function generator 2 is writen in advance a sinusoidal wave function value, and outputs a sinusoidal wave function value in response to the selection (address) of an element. The output of the generator 2 becomes the preset value of a counter 3. The output oof a frequency divider 4 and the output of the counter 3 are applied to an AND circuit 6, which in turn produces a switching signal of reverse phase. Accordingly, a switching signal can be outputted from a NOT circuit 6. |
