| 摘要 |
<p>PURPOSE:To shorten the time required to obtain a reproduced picture at the time of start or the like. CONSTITUTION:A magnetic tape 1 is transported around a rotating drum 2 by a capstan 3, and the signal from an FG provided in a driving motor 4 of the capstan 3 is supplied to the motor 4 through a speed detecting circuit 5 and a driver circuit 8 to perform the speed servo. The reproduced signal from a head 9 provided in the rotating drum 2 is supplied to an ATF error signal detecting circuit 13 through a regenerative amplifier 10, a band pass filter 11 which takes out the signal having a frequency f1 and a band pass filter 12 which takes out the signal having a frequency f2, and the detected error signal is supplied to an adding circuit 7 of the speed servo system through a switch 14 to perform the tracking control (phase servo). Further, a signal corresponding to the signal having the frequency f1 from the detecting circuit 13 is supplied to a detecting circuit 15, and the switch 14 is switched to the Vcc side by the detection signal.</p> |
