| 摘要 |
<p>Disclosed is a pulse generating apparatus used in a CATV receiving adapter for descrambling the sync signal in the video signal. The pulse generating apparatus comprises a peak detector for sampling the peak in the detected video signal, a half level detector for evaluating the half level of the detected peak voltage, and a pulse generator which compares the detected video signal with the half level voltage and produces a pulse rising at a time point of coincidence or the two voltage signals.</p> |
