Read/write head with a switching element coupled to read or write transducers

• US 9,613,642 B1
• Filed: 02/29/2016
• Issued: 04/04/2017
• Est. Priority Date: 02/29/2016
• Status: Active Grant

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Markey, Christopher Anthony, Erden, Mehmet Fatih, Trantham, Jon D.
• Primary Examiner(s): HINDI, NABIL Z
• Application Number:
  US15/056,755
• Time in Patent Office: 400 Days
• Field of Search: 360 31, 360 39, 360 46, 360 55, 360 61, 360 64, 360 75
• CPC Class Codes: G11B 5/012 Recording on, or reproducing or erasing from, magnetic disks G11B17/00, G11B19/00 take precedence
• CPC Class Codes: G11B 5/09 Digital recording
• CPC Class Codes: G11B 5/3977 from different information tracks

Abstract

A read/write head includes two or more first transducers of a first type, the first type selected from a magnetic read transducer and a magnetic write transducer. The read/write head includes one or more switching elements coupled to the two or more first transducers. The switching elements are configured to, in response to a control signal, couple a selected one of the two or more first transducers to a preamplifier circuit and decouple others of the two or more first transducers from the preamplifier circuit.

Claims

1. An apparatus, comprising:

two or more first transducers comprising two or more magnetic read transducers located on a common head-gimbal assembly or two or more magnetic write transducers located on the common head-gimbal assembly; and

a switching element located on the head-gimbal assembly and coupled to the two or more first transducers, the switching element configured to, in response to a control signal, couple a selected one of the two or more first transducers to a preamplifier circuit and decouple others of the two or more first transducers from the preamplifier circuit.

2. The apparatus of claim 1, further comprising two or more second transducers of a second type different than a first type of the two or more first transducers, the two or more second transducers located on the common head-gimbal assembly, the switching element coupled to the two or more second transducers and configured to, in response to the control signal, couple a selected one of the two or more second transducers to the preamplifier circuit and decouple others of the two or more second transducers from the preamplifier circuit.

3. The apparatus of claim 2, wherein the selected first and second transducers form a first group and the others of the first and second transducers form additional groups, wherein the first group and additional groups are selectable via the switching element in response to an operational criterion of the read/write head.

4. The apparatus of claim 3, wherein the operational criterion comprises a radial location of a recording medium over which the read/write head is positioned.

5. The apparatus of claim 3, wherein the operational criterion comprises a change between an operational mode and an error recovery mode.

6. The apparatus of claim 1, wherein the two or more first transducers are configured to operate in a two-dimensional magnetic recording mode.

7. The apparatus of claim 1, wherein the two or more first transducers are configured to operate in at least one of an interlaced magnetic recording mode and a shingled magnetic recording mode.

8. A method comprising:

determining a change of an operational criterion of a disk drive;

in response to the change of the operational criterion, sending a signal to a read/write head comprising a plurality of transducers, the plurality of transducers comprising at least one of read transducers and write transducers;

in response to the signal, coupling, via a switching element of the read/write head, a first group of the transducers to a preamplifier circuit and decoupling a second group of transducers from the preamplifier circuit; and

using the first group of transducers to access a recording medium according to the change in the operational criteria.

9. The method of claim 8, where the first and second groups each have at least one of the read transducers and at least one of the write transducers.

10. The method of claim 8, wherein using the first group of transducers to access the recording medium according to the change in the operational criteria comprises reading from the recoding medium in a two-dimensional magnetic recording mode.

11. The method of claim 8, wherein using the first group of transducers to access the recording medium according to the change in the operational criteria comprises recording to the recoding medium in at least one of an interlaced magnetic recording and a shingled magnetic recording mode.

12. The method of claim 8, wherein the change in the operational criterion comprises a change in a radial location of the read/write head over the recording medium.

13. The method of claim 8, wherein the change in the operational criterion comprises a change between an operational mode and an error recovery mode.

14. An apparatus comprising:

a read/write head comprising;

first and second groups of transducers, the transducers comprising at least one of magnetic read transducers and magnetic write transducers; and

a switching element coupled to the two or more groups; and

a controller coupled to the read write head, the controller configured to;

determine a change of an operational criterion of the apparatus;

in response to the change of the operational criterion, send a signal to the read/write head, the read/write head coupling the first group of the transducers to a preamplifier circuit and decoupling the second group of transducers from the preamplifier circuit in response to the signal; and

use the first group of transducers to access a recording medium according to the change in the operational criteria.

15. The apparatus of claim 14, where the first and second groups each have at least one of the read transducers and at least one of the write transducers.

16. The apparatus of claim 14, wherein using the first group of transducers to access the recording medium according to the change in the operational criteria comprises reading from the recoding medium in a two-dimensional magnetic recording mode.

17. The apparatus of claim 14, wherein using the first group of transducers to access the recording medium according to the change in the operational criteria comprises recording to the recoding medium in an interlaced magnetic recording mode.

18. The apparatus of claim 14, wherein using the first group of transducers to access the recording medium according to the change in the operational criteria comprises recording to the recoding medium in a shingled magnetic recording mode.

19. The apparatus of claim 14, wherein the change in the operational criterion comprises a change in a radial location of the read/write head over the recording medium.

20. The apparatus of claim 14, wherein the change in the operational criterion comprises a change between an operational mode and an error recovery mode.