| 摘要 |
<p>PURPOSE:To lock automatically the phase of two rectangular wave signals having different phase to each other, by integrating and averaging the phase difference and locking the phase at this value. CONSTITUTION:Two repetitive rectangular wave signals (a) and (b) with equal frequency and duty are inputted to a phase difference detection circuit 1. The phase difference detected at this detection circuit 1 integrates the signals (a) and (b) during a prescribed cycle and the average value per unit cycle is calculated from the integration value and applied to a phase-lock circuit 3, where the phase of the signal (a) or (b) is shifted by the phase difference corresponding to the average value obtained at the circuit 2 to lock the phase to the phase of other signal (b) or (a).</p> |
