| 摘要 |
<P>PROBLEM TO BE SOLVED: To control an operation point of a variable gain amplifier to be at a proper point even when a signal level and a detuning frequency of a disturbing wave vary. <P>SOLUTION: An operation point of a variable gain amplifier 1 is controlled to be at a proper point by an operation point controlling part 6 determining a reception state of a receiving signal RFin based on an output signal IFOUT and controlling an output signal from a mixer 2 based on the reception state of the receiving signal RFin. <P>COPYRIGHT: (C)2012,JPO&INPIT |
