| 摘要 |
PURPOSE:To obtain a reproducing device that can extract reproduced data without causing any malfunction at all times by stopping a function that controls a means for generating a clock that extracts the reproduced data at the vicinity of a joint point of signals. CONSTITUTION:In the device for obtaining reproduced data from signals obtained by reproducing continuously recording tracks in which composite signals consisting of periodic synchronizing signals and data signals are recorded, an analog switch 40 controls inputting of a horizontal synchronizing signal from a horizontal synchronizing separator circuit 8 and a pulse signal of frequency fH from a frequency divider 18 to a phase comparator 10. That is, the analog switch 40 is opened near a field switching point and inputting to the phase comparator 10 is prohibited. Consequently, a PLL circuit inclusive of the phase comparator 10 stops a function of controlling for a while. Accordingly, a malfunction of the PLL circuit due to lack of horizontal synchronizing signals near the field switching point can be prevented and reproduced data can be sampled accurately at all times. |
