| 摘要 |
<p>SYNCHRONOUS DETECTION SYSTEM A system is described for synchronously detecting a video signal along a selectable detection axis. The system includes a limiter receiving an input video signal and a phase-locked loop for developing an oscillator signal whose frequency is locked to the frequency of the video signal. A phase-adjustment network receives the oscillator signal from the phase-locked loop for adjusting the phase of the oscillator signal such that it corresponds to the desired axis of detection. A synchronous detector receives the input video signal and the phase-adjusted oscillator signal for detecting the video signal along the selected detection axis.</p> |
