TUT servo IC architecture

摘要

An integrated servo circuit that controls the spin motor and voice coil motor of a hard disk drive in response to digital commands that are generated by a microprocessor based controller chip. The servo chip contains a spin motor control circuit and a voice coil control circuit that control the speed of the spin motor and the position of the actuator arm, respectively. The spin motor and voice coil motor control circuits are coupled to a digital to analog converter which converts the digital commands from the controller chip into analog control signals which are utilized to control the spin motor and voice coil motor. Additionally, the servo chip has an analog to digital converter to convert analog signals, such as the servo burst signals, to digital bit strings that relayed to the controller chip. The controller chip and servo chip communicate through a 16 bit synchronous serial port.