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2.主导轴伺服电路主导轴伺服电路的作用是用来控制磁带的速度,它使用直接驱动电机,伺服电路在慢速到选看/复看方式时,控制速度和相位。此外在快进/快倒时带盘控制也通过使用主导轴电机来进行。 (1)FG脉冲发生器、FG放大器、FG施密特电路,FG脉冲做为主导轴速度反馈信号从主导轴电机获得,通过利用磁阻元件检测在转子外侧产生的磁力
2. Capstan Servo Circuits The servo circuit is used to control the speed of the tape. It uses a direct drive motor. The servo circuit controls the speed and phase when it is slowed to select view / reentry mode. In addition, the reel control is also performed by using the capstan motor during fast forward / rewind. (1) FG pulse generator, FG amplifier, FG Schmidt circuit, FG pulse as the capstan speed feedback signal obtained from the capstan motor, by using the magnetoresistive element to detect the magnetic force generated outside the rotor