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Horizontal-synchronizing-system

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Horizontal synchronizing system

Details

Inventors: Breithaupt, David W.;
Assignee: RCA Corporation (New York, NY)
Primary Examiner: Murray; Richard
Assistant Examiner:
Attorney, Agent or Firm: Whitacre; Eugene M., Rasmussen; Paul J., Troike; Robert L.

A horizontal synchronizing signal from a reference source is sampled at the vertical rate by a first sampling gate controlled by a vertical rate signal from a reference source. A signal related to the output of a horizontal frequency synchronizing pulse generator is sampled at the vertical rate by a second sampling gate controlled by the vertical rate signal. The output of each sampling gate is fed to an input of a phase detector which develops an error signal indicative of the phase relationship between the two sampled signals. The error signal is utilized to control the phase of the generated horizontal synchronizing pulse.

DETAILED DESCRIPTION In accordance with an embodiment of the present invention, a phase control circuit for the horizontal frequency synchronizing pulse generator in a television camera system comprises a first sampling gate controlled by a vertical rate signal for sampling a horizontal reference signal at the vertical rate.
A second sampling gate also controlled by the vertical rate signal samples a signal related to the output of the horizontal frequency synchronizing pulse generator at the vertical rate.
A phase detector responsive to the output signal from each of the sampling gates develops an error signal indicative of the phase relationship between the two sampled signals.
The error signal is utilized to control the phase of the generated horizontal synchronizing pulse.

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