Patent ID: 6586895
Filing Date: 2003-07-01
Classification: H04N

Abstract:
A deflection apparatus with raster distortion correction, comprising:a deflection winding coupled to a retrace capacitance to form a retrace resonant circuit during a retrace interval, and coupled to a trace capacitor to form a first trace resonant circuit that includes said deflection winding and said trace capacitor during a trace interval; a first switching semiconductor responsive to a synchronizing first signal at a frequency related to a first deflection frequency and coupled to said deflection winding for generating a deflection current in said deflection winding synchronized to said synchronizing signal; a modulation inductance that is coupled in a second trace resonant circuit during said trace interval; a source of a modulation second signal at a frequency related to a second deflection frequency; and, a second switching semiconductor responsive to said first and second signals, having a first switching state during a first portion of said trace interval and a second switching state during a second portion of said trace interval, said first and second portions varying in accordance with said second signal, said second switching semiconductor being coupled to said modulation inductance for producing in said modulation inductance and in said trace capacitor a modulation current that modulates a voltage developed in said trace capacitor in accordance with said second signal for providing the raster distortion correction.