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PINCUSHION CORRECTED VERTICAL DEFLECTION CIRCUIT

  • US 3,760,222 A
  • Filed: 02/07/1972
  • Issued: 09/18/1973
  • Est. Priority Date: 05/15/1970
  • Status: Expired due to Term
First Claim
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1. In a color television receiver, a vertical deflection circuit subject to introduction of a horizontal deflection frequency component for dynamic top-and-bottom pincushion correction of a displayed raster, said vertical deflection circuit including a vertical deflection winding having symmetrical halves traversed serially by a vertical deflection current;

  • a parallel resonant network serving as a source of said horizontal deflection frequency correction component and tuned to a frequency in the immediate vicinity of said horizontal deflection frequency, said network being interposed between said deflection winding halves for traversal by said vertical deflection current;

    a pair of similarly valued resistors connected in series between respective end terminals of said deflection winding halves remote from said resonant network, the junction of said series connected resistors being connected to an intermediate point in said parallel resonant network; and

    means, comprising a capacitor shunted across one of said winding halves, for providing substantial cancellation of horizontal deflection frequency voltage components between said end terminals.

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