| 摘要 |
PURPOSE:To obtain rectangular waves which shift in phase by 2pi/n mutually without reference to a frequency, by bringing synchronization into effect on detecting a point of maximum voltage 1/n of a reference rectangular wave. CONSTITUTION:Voltage control type rectangular-wave generators 11, 12 and 13 are driven by in-phase control voltages to extract and apply a rectangular wave generated by generator 11 as a reference wave to voltage comparator 15, which detect the point in time when the output voltage of the rectangular wave falls down to Vpp/3 to generate a trigger pulse via trigger waveform generating circuit 16. Generating circuit 12 receiving the trigger pulse is so set that a rectangular wave generated there will change from its rise to the fall at the point of the trigger pulse. Similarly, a rectangular wave generated by generator 11 is detected at the point of Vpp/3 to control generating circuit 13. |
