Detector for vertical synchronous signals

Detector for vertical synchronous signals

  • CN 1,046,648 A
  • Filed: 04/19/1990
  • Published: 10/31/1990
  • Est. Priority Date: 04/20/1989
  • Status: Abandoned Application
First Claim
Patent Images

1. , a kind of vision signal lock-out pulse detector (10) is characterized in that:

  • Be used for periodically counting device (14) that the level of the input signal (15) that comprises lock-out pulse is sampled, it has numeral output (17), the latter changes towards a direction along with detect this level in the sampling period, and changes towards other direction less than this level along with detecting in the sampling period;

    AndWhen exceeding fiducial value, the numeral output of counting device (14) produces the comparison means (18) of synchronous detecting pulse as output signal.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×