| 摘要 |
PURPOSE:To reduce the distortions by producing an approximate sine wave through superposition of different types of single-pulse trains. CONSTITUTION:The 1st single-pulse train has the same frequency and same amplitude as a desired sine wave. The 2nd single-pulse train has the same frequency and amplitude as the distortion component which is contained in said 1st pulse train and turned into a distortion component. The 2nd pulse train undergoes inversion of polarity and is superposed on the 1st pulse train to obtain the 3rd single-pulse train. The higher harmonic component can be excluded out of the 3rd pulse train. It is possible to exclude the distortion components even for a high-order higher harmonic component by repeating the above-mentioned processes. As a result, a sine wave having a small distortion component can be obtained when an approximate sine wave is produced through superposition of pulse waveforms. |
