| 摘要 |
Combined vertical deflection and top and bottom pincushion correction signals are applied to a single amplifier circuit which provides the required vertical deflection n output current as well as pincushion correction signals for a television receiver. Since the frequency of the vertical deflection and pincushion correction signals are substantially different, a series resonant circuit tuned to the horizontal deflection frequency is employed at the output of the amplifier to apply the pincushion signal to the vertical deflection yoke. The resonant circuit includes an inductor which is the primary winding of a transformer whose secondary winding is coupled in series with the vertical deflection yoke to inject the pincushion correction information into the vertical deflection yoke. Negative feedback is employed in the amplifier to preserve the parabolic waveform of the applied pincushion correction signal.
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