| 摘要 |
<p>A dynamic focus voltage generating circuit comprises a source (++V) of DC voltage coupled to a focus electrode (FG) of a cathode ray tube (CRT). A source (10, 20) of varying voltage is coupled to the focus electrode through a capacitance (200) formed by a pair of coaxial conductors. The outer conductor of said coaxial pair is coupled to said source of varying voltage, and the inner conductor of said coaxial pair is coupled to said source of DC voltage. <IMAGE></p> |
