Minimization of VCM-resolution switching induced position error transients

Patent metadata

Field	Value
Publication number	US-9240207-B1
Application number	US-201414223942-A
Country	US
Kind code	B1
Filing date	Mar 24, 2014
Priority date	Aug 10, 2007
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

Systems, methods, and devices for selecting modes of operation include, in at least one aspect, a method including: selecting a first mode associated with digital-analog conversion; determining whether a second mode associated with digital-analog conversion is available; if the second mode is available, evaluating one or more switching parameters associated with the second mode; switching from the first mode to the second mode if the one or more evaluated switching parameters satisfy one or more predetermined criteria; analyzing one or more performance parameters after switching from the first mode to the second mode; and setting the second mode as a default mode of operation if the one or more analyzed performance parameters are satisfactory.

First claim

What is claimed is:

1. A method comprising:
selecting, by processing hardware, a first mode associated with digital-analog conversion;
determining, by the processing hardware, whether a second mode associated with digital-analog conversion is available;
if the second mode is available, evaluating one or more switching parameters associated with the second mode;
switching from the first mode to the second mode if the one or more evaluated switching parameters satisfy one or more predetermined criteria;
analyzing one or more performance parameters after switching from the first mode to the second mode; and
setting the second mode as a default mode of operation if the one or more analyzed performance parameters are satisfactory.

2. The method claim of 1 , further comprising:
switching from the second mode back to the first mode if the one or more analyzed performance parameters do not meet one or more predetermined thresholds; and
setting the first mode as a default mode of operation after switching from the second mode back to the first mode.

3. The method claim of 1 , where determining whether a second mode is available includes identifying a mode with a resolution higher than a resolution of the first mode.

4. The method of claim 1 , where setting the second mode as a default mode of operation includes:
comparing the one or more performance parameters after switching from the first mode to the second mode with one or more performance parameters before switching from the first mode to the second mode; and
setting the second mode as a default mode of operation if the one or more performance parameters after switching from the first mode to the second mode demonstrate improvement over the one or more performance parameters before switching from the first mode to the second mode.

5. The method of claim 1 , where setting the second mode as a default mode of operation if the one or more analyzed performance parameters are satisfactory includes:
setting the second mode as a default mode of operation if the one or more analyzed performance parameters meet one or more predetermined thresholds.

6. The method of claim 1 , wherein if the second mode is set as the default mode of operation, the method further comprising:
determining whether a third mode associated with digital-analog conversion is available;
if the third mode is available, evaluating one or more switching parameters associated with the third mode;
switching from the second mode to the third mode if the one or more evaluated switching parameters associated with the third mode satisfy a predetermined criteria;
analyzing one or more performance parameters after switching from the second mode to the third mode; and
setting the third mode as a default mode of operation if the one or more analyzed performance parameters after switching from the second mode to the third mode are satisfactory.

7. A system comprising:
a storage device;
a digital-analog conversion module comprising hardware and configured to convert data for use with the storage device; and
a processing module comprising hardware and programmed to select a first mode associated with digital-analog conversion, determine whether a second mode associated with digital-analog conversion is available, evaluate one or more switching parameters associated with the second mode when the second mode is available, switch from the first mode to the second mode when the one or more evaluated switching parameters satisfy one or more predetermined criteria, analyze one or more performance parameters after switching from the first mode to the second mode, and set the second mode as a default mode of operation if the one or more analyzed performance parameters are satisfactory.

8. The system of claim 7 , wherein the processing module is programmed to switch from the second mode back to the first mode if the one or more analyzed performance parameters do not meet one or more predetermined thresholds, and set the first mode as a default mode of operation after switching from the second mode back to the first mode.

9. The system of claim 7 , wherein the processing module is programmed to determine whether the second mode is available by, at least in part, identifying a mode with a resolution higher than a resolution of the first mode.

10. The system of claim 7 , wherein the processing module is programmed to set the second mode as a default mode of operation by, at least in part, comparing the one or more performance parameters after switching from the first mode to the second mode with one or more performance parameters before switching from the first mode to the second mode, and setting the second mode as a default mode of operation if the one or more performance parameters after switching from the first mode to the second mode demonstrate improvement over the one or more performance parameters before switching from the first mode to the second mode.

11. The system of claim 7 , wherein the processing module is programmed to set the second mode as a default mode of operation by, at least in part, setting the second mode as a default mode of operation if the one or more analyzed performance parameters meet one or more predetermined thresholds.

12. The system of claim 7 , wherein the processing module is programmed to, if the second mode is set as the default mode of operation, determine whether a third mode associated with digital-analog conversion is available, evaluate one or more switching parameters associated with the third mode if the third mode is available, switch from the second mode to the third mode if the one or more evaluated switching parameters associated with the third mode satisfy a predetermined criteria, analyze one or more performance parameters after switching from the second mode to the third mode, and set the third mode as a default mode of operation if the one or more analyzed performance parameters after switching from the second mode to the third mode are satisfactory.

13. A device comprising:
a digital-analog converter; and
circuitry configured to select a first mode associated with digital-analog conversion, determine whether a second mode associated with digital-analog conversion is available, evaluate one or more switching parameters associated with the second mode when the second mode is available, switch from the first mode to the second mode when the one or more evaluated switching parameters satisfy one or more predetermined criteria, analyze one or more performance parameters after switching from the first mode to the second mode, and set the second mode as a default mode of operation if the one or more analyzed performance parameters are satisfactory.

14. The device of claim 13 , wherein the circuitry is configured to switch from the second mode back to the first mode if the one or more analyzed performance parameters do not meet one or more predetermined thresholds, and set the first mode as a default mode of operation after switching from the second mode back to the first mode.

15. The device of claim 13 , wherein the circuitry is configured to determine whether the second mode is available by, at least in part, identifying a mode with a resolution higher than a resolution of the first mode.

16. The device of claim 13 , wherein the circuitry is configured to set the second mode as a default mode of operation by, at least in part, comparing the one or more performance parameters after switching from the first mode to the second mode with one or more performance parameters before switching from the first mode to the second mode, and setting the second m

Assignees

• Marvell Int Ltd
• Mavell Internat Ltd

Inventors

• Neos Perry

Classifications

• G11B5/5547 Primary

  "Seek" control and circuits therefor (G11B5/5556 takes precedence) · CPC title

• G11B27/36

  Monitoring, i.e. supervising the progress of recording or reproducing {(for digital recording G11B20/00 and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by H04N5/76 and subgroups, see H04N17/06)} · CPC title

• G11B20/10037 Primary

  A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof · CPC title

• G11B5/59688

  Servo signal format patterns or signal processing thereof, e.g. dual, tri, quad, burst signal patterns · CPC title

• G11B5/5556

  with track following after a "seek" · CPC title