Title:
【発明の名称】電荷制御ラスタ補正回路
Document Type and Number:
Japanese Patent JP2001523415
Kind Code:
A
Abstract:
An East-West switching transistor is coupled between a flyback transformer primary winding and a horizontal deflection output transistor circuit to control retrace energy to obtain an East-West modulation of the deflection current amplitude as required for East-West pincushion raster correction. A pair of series coupled first and second capacitors forming a capacitive voltage divider are coupled to a retrace resonant circuit that includes the deflection winding via a sampling switch, during a first half of a retrace interval, to produce a first ramping capacitor voltage in the first capacitor from a portion of a retrace pulse voltage. The first capacitor is coupled to an East-West pincushion raster correction current source for producing a second ramping capacitor voltage in the first capacitor that ramps in an opposite direction. A comparator is responsive to the capacitor voltage for controlling a conduction interval of the East-West switching transistor.
Inventors:
Hafar, Peter Eduart
Webber, Rudolph
Webber, Rudolph
Application Number:
JP54701898A
Publication Date:
November 20, 2001
Filing Date:
April 10, 1998
Export Citation:
Assignee:
Thomson Licensing Society Anonymous
International Classes:
H04N3/23; G09G1/00; G09G1/04; H04N3/223; H04N3/233; (IPC1-7): H04N3/23; G09G1/00; G09G1/04
Attorney, Agent or Firm:
Katsunori Watanabe