| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an I/Q demodulation circuit capable of correcting a DC offset and a phase offset without delay in the case of an I/Q demodulation operation. <P>SOLUTION: This I/Q demodulation circuit has a reference sinusoidal signal generator 102, a selector 103, an offset amount detection circuit 106, a storage circuit 107 and an offset correction circuit 108. An offset amount obtained in an offset detection mode is stored beforehand, offset correction is performed on the basis of the stored information in a normal receiving mode. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
