| 摘要 |
<p>A circuit for developing, in a deflection system for a cathode ray tube in which the electron gun is disposed at an angle other than normal to the cathode ray tube screen, a correction waveform to insure the production of a rectangular raster on the screen. A voltage waveform corresponding substantially to the uncorrected vertical deflection current waveform is applied to the vertical deflection coil through a resistor and a switch circuit which is rendered conductive during horizontal sweep intervals and non-conductive during horizontal flyback intervals of the deflection system. Energy thus supplied to the vertical deflection coil during these intervals cooperates with the inductance of the deflection coil to generate the desired correction waveform within the deflection coil. This avoids the need for specially designing the amplifying stages and the vertical deflection circuits to accommodate a modified vertical deflection waveform produced at low level and supplied to the vertical deflection coil.</p> |
