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removal of the u00fcbergangserscheinungen at a power supply of the dynamic focus during the austastperiode
removal of the u00fcbergangserscheinungen at a power supply of the dynamic focus during the austastperiode
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机译:在节假日期间,在动态焦点的电源处删除 u00fcbergangserscheinungen
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摘要
In order to accurately measure a low current bias in an automatic kine bias (AKB) circuit during several video lines that immediately follow vertical retrace, dynamic focus is interrupted by deactivating a dynamic focus voltage amplifier. The amplifier draws its power from a horizontal flyback transformer. In order to avoid a horizontal transient which may occur when the dynamic focus voltage amplifier is reactivated after being deactivated during a vertical blanking interval, the dynamic focus amplifier draws a current during vertical blanking which approximates the average current drawn during vertical scan.
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