Magnetic disk memory track change servo

Details Magnetic disk memory track change servo Magnetic disk memory track change servo

1982-03-24

1984-10-30

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

318561, 318616, G11B 555, G11B 2108

Patent

active

044802790

ABSTRACT:
A disk control circuit for a magnetic disk apparatus including a magnetic disk for storing data, a carriage for supporting a first magnetic head for reading data and a second magnetic head for reading servo data while undergoing radial movement with respect to the disc, a motor for driving the carriage, a motor driving circuit for driving the motor, a converter circuit for converting servo data to a position signal, to a speed signal, and to a track pulse, a processor for generating target speed information and track offset information, a servo control register for storing the track speed information and the track offset information, a digital to analog convertor for converting the track information to an analog signal, signal selector means for selectively generating motor control signals based on predetermined combinations of the speed signal, the position signal and the analog signal produced by the digital to analog converter, and a motor drive controller for generating and applying motor drive control signals to the motor driving circuit in response to the motor control signals.

REFERENCES:
patent: 4068269 (1978-01-01), Commander et al.
patent: 4237502 (1980-12-01), Erickson et al.

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