| 摘要 |
PROBLEM TO BE SOLVED: To solve problems, for example, when change ratio of an analog signal becomes larger compared with a sampling period of the signal, data variation becomes larger, and accuracy of acquired data is damaged, on the other hand, when population of the acquired data becomes smaller, a noise component included in the data cannot be removed easily, and the accuracy of the acquired data is damaged, so that highly accurate transport control cannot be achieved.SOLUTION: In an analog encoder signal processing circuit performing drive control of an LF motor, a stage number of an LPF is switched kinetically according to transport speed of a recording medium. During low speed, the stage number of the LPF is increased compared with during high speed, for performing highly accurate position control. |
