| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress unnecessary wave component with high accuracy, and also reduce cost and size. <P>SOLUTION: An auxiliary signal line 2 and a constant calculation line 3 which are distributed from a main signal line 1 are provided. In an unnecessary wave removing constant calculation circuit 3b of the constant calculation line 3, a weighting constant for removing unnecessary wave component which is superposed in common in both of the main signal line 1 and the auxiliary signal line 2 is calculated and stored in an unnecessary wave removing constant holding memory 3c while an external input does not exist. Then, the state is switched to a state that the external input is permitted, and the stored weighting constant is reflected to the signal of the auxiliary signal line 2 and compounded with the signal of the main signal line 1, and thereby, unnecessary wave component which has correlation mutually can be removed from the signal of the main signal line 1. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
