| 摘要 |
PURPOSE: To attain plural different filter characteristics by simple constitution by preparing plural operation sequences for one delay circuit system. CONSTITUTION: Output signals from respective delay output stages of a delay circuit 19 are inputted to respective operation sequences OP1 to OPm in common. On the other hand, individual filter coefficient groups are inputted to respective operation sequences OP1 to OPm. Each of the sequences OP1 to OPm multiples the filter coefficients of degrees corresponding to respective delay output stages by the output signals of respective delay output stages by the use of each inherent filter coefficient group and inherent finite impulse response type filter operation is individually executed in each of the sequences OP1 to OPm. Thereby filter operation capable of attaining individual filter characteristics in respective operationsequence OP1 to OPm can be executed only by one delay circuit 19. Consequently plural different filter characteristics can be easily attained. |
