| 摘要 |
PURPOSE:To establish the transformer of high performance which can be used for CRT of high potential system requiring high focus voltage to the anode voltage, by improving the pick up method of high voltage pulse produced in secondary winding. CONSTITUTION:The secondary winding of the flyback transformer is split into the H winding 2, L windings 3a and 3b, and one end of the L winding 3b is grounded or connected to the automatic luminance control circuit terminal, and another end is connected to one end of the L winding 3a via the rectifying element 6. Further, the L winding 3a is provided with the focus terminal 8 and the focus voltage of CRT is picked up. Another end of the L winding 3a is connected to one end of the H winding 2 via the rectifying element 5, other end of the H winding 2 is connected to the high voltage terminal 7 via the rectifying element 4, and the terminal 7 is connected to the anode of CRT. Further, the tuning for fifth harmonics is taken between the primary winding 1 and the H winding 2, and tuning for the 7th or 9th harmonics is taken between the L winding 3a,3b and the primary winding 1. |
