Horizontal deflection circuit with raster distortion correction

Details Horizontal deflection circuit with raster distortion correction Horizontal deflection circuit with raster distortion correction

1984-12-21

1986-06-10

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315371, H01J 2970, H01J, H01J

Patent

active

045945349

ABSTRACT:
A horizontal deflection circuit with raster distortion correction includes a horizontal deflection winding coupled to a first retrace capacitor and an input inductance such as the primary winding of a flyback transformer coupled to a second retrace capacitor. Horizontal switching elements are operated at a horizontal deflection rate for generating current in the inductance and a horizontal scanning current in the deflection winding. During retrace, the horizontal deflection winding and the first retrace capacitor form a first resonant circuit and the input inductance and the second retrace capacitor form a second resonant circuit. One of the switching elements decouples the resonant circuits from each other to minimize the interaction therebetween. A source of raster distortion correction current is coupled to the deflection winding to provide the required scanning current modulation.

REFERENCES:
patent: 4162433 (1979-07-01), Van Hattum et al.
patent: 4184104 (1980-01-01), Shouse, Jr.
patent: 4223367 (1980-09-01), Zappala
patent: 4381477 (1983-04-01), Bergmans
patent: 4390818 (1983-06-01), Nagai et al.
patent: 4429257 (1984-01-01), Haferl
U.S. patent application Ser. No. 651,301, by P. E. Haferl, filed 9/17/84, entitled East-West Correction Circuit.

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