| 摘要 |
PURPOSE:To make the diode forming an OR circuit double a switching diode, by forming the power source to the VHF mixing circuit into the one which secured an OR of the VHF/UHF switching power source. CONSTITUTION:With connection of the switch 14 to the side of the VHF power supply terminal Bv, the power supply is given to the VHFRF.AMP1, VHFOSC3 and VHFMIX2 to receive the VHF. No power is supplied to the UHF side by the diode 12. When the switch 14 is connected to the UHF power supply terminal Bu, the power is supplied to the UHFRF.AMP4, UHFMIX5, UHFOSC6 and VHFNIX2 each. Then the VHFMIX2 functions as the intermediate frequency amplifier. No power is supplied to other VHF circuits through the diode 11. |
