Circuit arrangement for deriving pulses of horizontal and vertic

Details Circuit arrangement for deriving pulses of horizontal and vertic Circuit arrangement for deriving pulses of horizontal and vertic

1996-10-29

1998-11-10

Lee, Michael

Television

Synchronization

Sync separation

348529, H04N 510

Patent

active

058351540

ABSTRACT:
A circuit arrangement for deriving horizontal frequency and vertical frequency pulses from a synchronizing signal, in which all clocked components are provided with the same clock during the digital processing of the synchronizing signal. Too derive the horizontal (H) pulse signal, a logic circuit 2 is provided which combines the sync signal with a masking pulse signal derived from the clocked sync signal. To derive the vertical (V) pulse signal in the clock raster, a counting flip-flop 14 is driven by the clocked sync signal after combination with the vertical pulse signal via an interference pulse signal suppression circuit 10. To derive the 2V pulse signal, a logic circuit 17 is provided which combines the V pulse signal with a pulse signal derived from the clocked sync signal.

REFERENCES:
patent: 4405945 (1983-09-01), Sato
patent: 4459612 (1984-07-01), Shinkai et al.
patent: 4600944 (1986-07-01), Williams
patent: 4792852 (1988-12-01), Narusawa
patent: 5132794 (1992-07-01), Okada et al.

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