Hardware PES calculator

Details Hardware PES calculator Hardware PES calculator

1997-09-24

2000-10-10

Klimowicz, William

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7707, G11B 5596

Patent

active

06130798&

ABSTRACT:
In the disk controller in a hard disk system, the microcontroller is an integral part of the servo positioning system. The servo positioning system is the system responsible for positioning the read/write heads. This involves moving the read/write heads from track to track and holding the head in place as data is read or written. A time and calculation intensive portion of the control algorithm is the calculation of the position error signal, which represents the degree to which the actual position of the head varies from the desired position. A hardware position error signal circuit is provided to calculate this signal, thus freeing microprocessor bandwidth for other tasks and facilitating a more stable controller. Furthermore, a circuit for adjusting erroneous cylinder numbers is provided.

REFERENCES:
patent: 5760990 (1998-06-01), Ukani et al.
patent: 5818659 (1998-10-01), Cheung et al.
patent: 5828516 (1998-10-01), Park

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