| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio reception circuit which secures sufficient isolation and which reduces interference by means of other bands when respective bands are received by controlling a first selection means selecting and outputting one signal between a first signal and a second signal converted into a first frequency band and an amplifying means. SOLUTION: A first detection means 101 detects the first signal of a first frequency band from an input signal. A second detection means 120 detects the second signal of a second frequency band from the input signal. Frequency conversion means 127 and 128 convert the second signal of the second frequency band into the first frequency band. An amplifying means 151 amplifies and outputs the first signal. The first selection means 152 selects and outputs one signal between the first signal and the second signal converted into the first signal into the first frequency band. A control means 153 controls the amplifying means 151 and the first selection means 152. Thus, interference by the other signal can be prevented.
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