| 摘要 |
PROBLEM TO BE SOLVED: To provide a matched filter circuit which has the diffusion coefficient variable by considering that the diffusion coefficient must by changed in the future, in accordance with a use state and externally designating a diffusion coefficient. SOLUTION: This matched filter circuit provides a switch circuit 44 corresponding to a sample hold circuit 42 of a row that corresponds to a diffusion coefficient to be changed among sample hold circuits 42, which are arranged in accordance with rows of only several minutes of the maximum diffusion coefficient in each column of only several minutes of the maximum diffusion coefficient. This matched filter circuit turns off the corresponding switch circuit 44, in accordance with a diffusion coefficient by a controlling means 45 and electrically cuts off sample and hold circuits 42 after that. |
