TUT servo IC architecture

A servo integrated circuit chip that can be coupled to a controller chip that generates digital spin motor and digital voice coil motor commands to control a spin motor for rotating a disk and a voice coil motor for positioning an actuator arm assembly relative to the disk, said servo integrated circuit chip comprising:

• digital-to-analog converter means for converting the digital spin motor and digital voice coil motor commands from the controller chip to analog spin motor and analog voice coil motor control signals;
• spin motor control means for receiving said analog spin motor control signal from said digital-to-analog converter means and for controlling the spin motor and thereby the rotational speed of the disk;
• voice coil motor control means for receiving said analog voice coil motor control signal from said digital-to-analog converter means and for controlling the voice coil motor to control the position of the actuator arm assembly relative to the disk;
• and
• wherein said digital-to-analog converter means, said spin motor control means, and said voice coil motor control means are disposed on a common substrate within an integrated circuit package.

A disk drive electronic architecture that controls a spin motor for rotating a disk and a voice coil motor for positioning an actuator arm assembly relative to the disk, comprising:

• a controller integrated circuit chip for outputting digital spin motor and digital voice coil motor commands to control the spin motor and the voice coil motor, respectively;
• and
• a servo integrated circuit chip coupled to said controller chip and comprising:.
• a digital-to-analog converter circuit that converts said digital spin motor and digital voice coil motor commands from said controller chip to analog spin motor and analog voice coil motor control signals,
• a spin motor control circuit that receives said analog spin motor control signal from said digital-to-analog converter circuit and controls the spin motor and thereby the rotational speed of the disk, and
• a voice coil motor control circuit that receives said analog voice coil motor control signal from said digital-to-analog converter circuit and controls the voice coil motor to control the position of the actuator arm assembly relative to the disk,
• wherein said digital-to-analog converter circuit, said spin motor control circuit, and said voice coil motor control circuit are disposed on a common substrate within a servo integrated circuit package.

A disk drive electronic architecture that can control a spin motor for rotating a disk and a voice coil motor for positioning an actuator arm assembly relative to the disk, comprising:

• controller means for outputting digital spin motor and digital voice coil motor commands that control the spin motor and the voice coil motor, and receiving digital feedback signals indicative of operation of one of the spin motor and the voice coil motor, wherein said controller means includes controller circuitry on a controller substrate within a controller integrated circuit package;
• and
• a servo integrated circuit chip coupled to said controller means and comprising:
• digital-to-analog converter means for converting said digital spin motor and digital voice coil motor commands from said controller means to analog spin motor and analog voice coil motor control signals,
• spin motor control means for receiving said analog spin motor control signal from said digital-to-analog converter means and for controlling the spin motor and thereby the rotational speed of the disk, and
• voice coil motor control means for receiving said analog voice coil motor control signal from said digital-to-analog converter means and for controlling the voice coil motor to control the position of the actuator arm assembly relative to the disk,
• wherein said digital-to-analog converter means, said spin motor control means, and said voice coil motor control means are disposed on a common substrate within an integrated circuit package.