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US 7,301,724 B2Granted
Transducing head
AssigneeHewlett-Packard Development Company, L.P.
InventorSteven L. Brittenham
Life of this patent
Estimating the term…
Abstract
Determining an error in position of at least two heads coupled to a piezoelectric material, and changing a potential applied to a piezoelectric material to reduce the error in position of the at least two heads.
Claims25
A control system comprising:
- a transducer further comprising:
- a first servo element;
- and
- a second servo element spaced from the first servo element;
- and
- a ceramic element having a length that includes both the first servo element and the second servo element and the space between the first servo element and the second servo element, the first servo element and the second servo element attached between the ends of the ceramic element;
- a tape further comprising:
- a first track with servo information thereon:
- and
- a second track with servo information thereon, the second track spaced from the first track;
- a position signal indicating when a space between the first servo element and the second servo element differs from a space between the first track and the second track;
- and
- means for changing the spacing between the first servo element and the second servo element by changing the length of the ceramic element in response to the position signal, wherein the ceramic element is a piezoelectric material.
10 more elements
A transducer comprising:
- a piezoelectric material having a first end and a second end:
- a first read head coupled to the piezoelectric material;
- a second read head coupled to the piezoelectric material, the second read head spaced from the first read head;
- a third read head coupled to the piezoelectric material, the third read head spaced from the second read and spaced from the first read head;
- a first electrode coupled near the first end of the piezoelectric material;
- and
- a second electrode coupled near the second end of the piezoelectric material, wherein changing the length of the piezoelectric material changes the spacing between the first read head and the second read head and the third read head in approximately the same proportion as the change in the length of the piezoelectric material.
4 more elements
A transducer comprising:
- a piezoelectric material having a first end and a second end:
- a first read head coupled to the piezoelectric material;
- a second read head coupled to the piezoelectric material, the second read head spaced from the first read head;
- a first electrode coupled near the first end of the piezoelectric material;
- a second electrode coupled near the second end of the piezoelectric material, the space between the first head and the second head configured to change in response to a change in the piezoelectric material;
- and
- a read/write head adapted to read and write information representative of data.
4 more elements
A transducer comprising:
- a piezoelectric material having a first end and a second end:
- a first read head coupled to the piezoelectric material;
- a second read head coupled to the piezoelectric material, the second read head spaced from the first read head;
- a first electrode coupled near the first end of the piezoelectric material;
- and
- a second electrode coupled near the second end of the piezoelectric material, wherein the first and second read heads include a magnetoresistive element, and wherein the space between the first head and the second head changes in response to a change in the piezoelectric material.
3 more elements
A tape drive comprising:
- a tape transport mechanism;
- and
- a transducer further comprising:
- a piezoelectric material having a first end and a second end:
- a first read head coupled to the piezoelectric material;
- a second read head coupled to the piezoelectric material, the second read head spaced from the first read head;
- a third read head coupled to the piezoelectric material, the third read head spaced from the second read and spaced from the first read head;
- a first electrode coupled near the first end of the piezoelectric material;
- and
- a second electrode coupled near the second end of the piezoelectric material, wherein the space between the first head and the second head and the third head changes in response to a change in the piezoelectric material, the space changes between the heads in approximately the same proportion as the change in the length of the piezoelectric material.
7 more elements
A method comprising:
- providing a piezoelectric substrate;
- forming a plurality of read heads on the piezoelectric substrate;
- and
- applying a voltage to the piezoelectric substrate to change the spacing between the plurality of read heads attached to the piezoelectric substrate, wherein the substrate is a wafer, the method further comprising dicing the wafer to form a transducer having a plurality of read heads on the substrate.
1 more element
Dependencies are inferred from the claim text.