| 摘要 |
PURPOSE:To enable the reception of the TV signals having the different band widths, by providing the trap circuit which can switch the trap frquency. CONSTITUTION:When the change-over switch of the trap frequency is turned off, the trap circuit 46 is set so as to synchronize with 31.2MHz. While in case the change-over switch is on, the trap frequency shifts to a lower level side and then set to secure e.g. 26.55MHz. In this way, the trap of 26.55MHz due to the video intermediate frequency band pass filter circuit 52 can be eliminated. |
