Circuits, systems, and methods for capacitive fly height...

Details Circuits, systems, and methods for capacitive fly height... Circuits, systems, and methods for capacitive fly height...

2008-05-20

2009-11-24

Sniezek, Andrew L (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S031000

Reexamination Certificate

active

07623315

ABSTRACT:
Circuitry, systems, and methods for measuring the fly height of a read/write head in a magnetic data storage system. The circuitry generally includes a measurement circuit configured to determine an electrical current of a periodic signal applied to the read/write head, wherein the periodic signal has a generally constant voltage slew rate, and a fly height converter configured to produce an output signal based on a value of the electrical current, wherein the output signal corresponds to the fly height. The present invention advantageously provides for electronically measuring the fly height of a read/write head in situ in a magnetic storage system. The sensed fly height may then be used by the system to control fly height actuation.

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Parviz Rahgozar and Pantas Sutardja; “Circuits, Architectures, Apparatus, Systems, and Methods for Maintaining Constant Spacing in a Read/Write Apparatus for Data Storage”; U.S. Appl. No. 11/355,459, filed Feb. 15, 2006.

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