| 摘要 |
Two line delay circuits and three line frequency switches are used to produce three simultaneous colour signals. By addition of the direct, the sequential signal delayed by a line, and the sequential signal delayed by two lines, a light intensity signal comprising the synchronization signal is produced. During the length of time the vertical synchronization signal is in the position of the light intensity signal the direct, or the line delayed, or the two lines delayed sequential signals is switched through to the output of the reproducing circuit with amplitude increased about three times. The vertical synchronization signal is thus transmitted without distortion or interference. |
