| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a receiver capable of removing an image over wide bands with high accuracy in a low-IF receiver. <P>SOLUTION: Before reception, a calibration signal of a frequency f<SB>i</SB>(1≤i≤N) is input to a receiver, and frequency characteristics f<SB>a</SB>(z) to f<SB>d</SB>(z) of a calibration filter in a filter mismatch calibration circuit (FIL_CAL) 195 are determined so as to turn into zero mismatching of amplitudes and phases between I component and Q component in a quadrature demodulation signal at a frequency f<SB>IFi</SB>. <P>COPYRIGHT: (C)2007,JPO&INPIT |
