| 摘要 |
A television tuner for two VHF frequency ranges and one UHF frequency range has a common aerial connector 4, to which appropriately dimensioned input filter circuits 1, 2, 3 are connected. The input filter circuits 2, 3 for the upper frequency ranges II, III can be switched on or off using switches 11, 12. To keep the mutual effect of the input filter circuits 1, 2, 3 low, and to enable all reception channels from 50 to 890 MHz to be selected, the switches 11, 12 are placed in each case between the aerial connector 4 and the associated input filter circuit 2, 3. <IMAGE>
|
