| 摘要 |
<p>PURPOSE:To provide the rectangular wave of an arbitrary phase difference as against the phase of a basic wave. CONSTITUTION:An input wave phase advance part 13 selectively phase-advances the basic wave 51 from a basic wave oscillator 11 by 90 degrees and an in-phase/anti-phase switching part 14 switches output 52 :q an in-phase or anti-phase. A hysteresis generation circuit 16 generates two hysteresis voltages with the AC ground point of the basic wave 51 as a center and a comparator part 15 compares the output 52 of the input wave phase advance part 13 with hysteresis voltage 53 and outputs the rectangular wave 54. The phase of the rectangular wave 54 is varied in the range of 0 to 90 degrees when the phase of the input wave is not advanced by 90 degrees and the phase is not inverted, 180 to 270 degrees when the phase is not advanced by 90 degrees but the phase is inverted, 90 to 180 degrees when the phase is advanced by 90 degrees and the phase is not inverted and 270 to 360 degrees when the phase of the input wave is advanced by 90 degrees and the phase is inverted. A one-shot multivibrator part 19 outputs a one-shot pulse 55 at the timing of the rise of the rectangular wave 54.</p> |
