Two-loop line deflection system

Details Two-loop line deflection system Two-loop line deflection system

H - Electricity

04

N

350/36

H04N 5/12 (2006.01)

Patent

CA 1256980

RCA 82,090 ABSTRACT In a synchronized digital horizontal deflection system operating at 2xfH, a digital phase-lock-loop circuit generates first fH rate signal that is synchronized to the horizontal sync pulses, and a second fH rate second signal that is delayed from the first signal by one-half of the period H. A digital phase-control-loop circuit receives the first and second signals and generates a horizontal deflection control signal at 2xfH rate that controls the retrace interval timing in a deflection circuit output stage. The synchronization of every other retrace interval occur in accordance with information provided by the first signal.

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