| 摘要 |
<p>PURPOSE:To reduce the scale of a circuit and miniaturize a device by a method wherein a signal, showing the detected number of rotation of a motor selected from a plurality of motors, is outputted to a servo circuit while the selected signal is inputted into a driver switching circuit to drive the motor. CONSTITUTION:A mode switching signal A, selecting a play mode from a CPU, is outputted to a FG switching circuit 17 and a driver switching circuit 18. Then, the FG switching circuit 17 provides a servo circuit 15 with only the output of a FG amplifier 14a, which shows the detected number of rotation of a capstan motor 11. At the same time, the driver switching circuit 15 is operated so as to give an output from the servo circuit 15 to only a driver 16a which drives the capstan motor 11. Accordingly, the servo circuit 15 is used only for effecting the servo of the capstan motor 11 and forms a servo system for the capstan motor 11.</p> |
