| 摘要 |
PURPOSE:To provide a vertical DAF circuit where vertical DAF always becomes vertical even if vertical deflecting current is changed at an aspect switching mode in a 16:9 wide television receiver of a PAL/NTSC system. CONSTITUTION:A 50Hz/60Hz discrimination circuit for DAF 5 discriminates 50Hz/60Hz of a vertical synchronizing signal 1, and a 50Hz/60Hz oscillation switching circuit for DAF 6 changes over the oscillation frequency of a vertical DAF oscillation circuit 7. Vertical DAF output from a vertical DAF output circuit 4 driven by a vertical DAF drive circuit 3 is set to be always constant. |
