| 摘要 |
<p>Line scanning system for a picture tube. When a line scanning system with symmetrical sweep is used, an asymmetricl course of the scanning beam (ia) during one line is formed. This deviation from the desired course must be corrected. The scanning coil (AS) is connected to the output (a) of an amplifier (VI), a controller output (Us1, Us2) obtained from the scanning current (ia) and the voltage (Ud) at the scanning coil (AS) being disposed at the control input (f) of said amplifier. Application particularly to a television receiver with symmetrical scanning for high resolution systems (HDTV).</p> |
