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Fully digital control and drive combination IC with on-board DSP for disk mass storage device
Fully digital control and drive combination IC with on-board DSP for disk mass storage device
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机译:具有板载DSP的全数字控制和驱动器组合IC,用于磁盘大容量存储设备
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摘要
The device is for driving and controlling a rotation motor and a voice coil motor for a hard disk drive system that includes a disk and an arm carrying a read/write head to be positioned with respect thereto. A duty-cycle control loop including a current sensing circuit is connected to the voice coil motor, and an arm position control loop including a speed detection circuit is also connected to the voice coil motor. The duty-cycle control loop and the arm position control loop are digitally implemented by a DSP as a function of digital data representing a first analog signal generated by the current sensing circuit representative of current conducting in a winding of the voice coil motor, and a second analog signal generated by the speed detection circuit representative of an instant speed of the voice coil motor.
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