| 摘要 |
PURPOSE:To prevent a reproduced signal from deteriorating, by controlling the characteristics of a reproduced signal processing circuit such as a reproductive equalizer according to the tape running speed of reproduction. CONSTITUTION:If the running speed of a tape has deviation from a normal reproduction speed and the frequency axis of the reproduced signal (a) varies, the equalizing characteristics of the equalizer 2, delay characteristics of a filter 3, and discrimination thresh-old of a data discriminator 4 are all optimized by a control signal (f) outputted from a microcomputer 7 according to variation in relative speed. At the same time, the center frequency of a BPF5 and leading-in characteristics and leading-in center frequency of a PLL6 are optimized by the control signal (f) and a switching signal (g) to supply a clock (p) in the best state from the PLL6 to the data discriminator 4. |
