| 摘要 |
A horizontal deflection circuit includes a horizontal deflection winding coupled to a retrace capacitor to form a retrace resonant circuit. An S-shaping capacitor is coupled to the deflection winding to form a first trace resonant circuit. A first switching transistor is responsive to a synchronizing first signal at a frequency related to a horizontal deflection frequency and coupled to the deflection winding for generating a deflection current in the deflection winding. A second switching transistor is responsive to the first signal and having first and second switching state, during first and second portions of the trace interval. The second switching transistor couples the S-shaping capacitor to a modulation inductance and to a modulation capacitor to form a second trace resonant circuit, during the second portion of the trace interval. The length of the second portion is modulated at a vertical rate parabolic manner for modulating a current in the S-shaping capacitor to provide modulated S correction.
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