| 摘要 |
<p>PURPOSE:To improve the interpretation of a desired signal in an indicator by adopting the structure that a switch noise from a switch eliminating an undesired wave is absorbed by a mixer. CONSTITUTION:In order to eliminate an undesired wave superimposed on a desired wave of an input RF signal, a LOCAL signal of a mixer 1 is turned off for a time band of the undesired wave with a switch 3, the switch noise generated in the switch 3 is absorbed by the mixer 1 and an objective undesired wave is eliminated, A filter 2 to extract a desired frequency is provided to an output of the mixer 1, a reception processing circuit 4 executes desired reception processing and a VIDEO signal is outputted to an indicator 20.</p> |
