| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a wireless communication apparatus adopting the direct conversion system capable of executing DC offset correction compatible with the time division communication system and the always on communication system that can be downsized and reduce the manufacturing cost. <P>SOLUTION: The wireless communication apparatus adopting the direct conversion system associated with a working example includes correction circuit selection sections SW1 to SW3, EN4 capable of activating either of a first correction circuit 10 and a second correction circuit 20. The first correction circuit 10 executes the DC offset correction processing corresponding to the time division communication system. The second correction circuit 20 executes the DC offset correction processing corresponding to the always on communication system. Further, the first correction circuit 10 includes a switch section SW1 arranged to a pre-stage of a D/A converter 13 and capable of alternatively selecting the connection between the D/A converter 13 and a logic section (offset detection section) 12 and the connection between the D/A converter 13 and a baseband processing section 30. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
