Method and apparatus for adaptive control and/or use of a...

Details Method and apparatus for adaptive control and/or use of a... Method and apparatus for adaptive control and/or use of a...

2008-05-12

2011-12-13

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

C360S075000

Reexamination Certificate

active

08077420

ABSTRACT:
Apparatus and methods are disclosed for adaptive control and/or use of a vibration sensor in a hard disk drive (HDD). The HDD, an assembled circuit board and a control circuit are disclosed. The control circuit is configured to electrically couple to piezoelectric devices and includes a sensor interface and a processor. The processor may be configured to receive a sensor reading from the sensor interface and may further be configured to send a gain control signal and/or an input selection signal to the sensor interface. The sensor interface includes pads for electrically coupling to the piezoelectric devices. The sensor interface may respond to the gain control signal by altering a gain of a signal from one pad used and/or may respond to the input selection signal in certain states by disabling one of these signals from affecting the sensor reading. Manufacturing by calibration of the gain control is disclosed.

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Analog Dialogue vol. 3, # 8, Sep. 1999 by Brian Black.
ADC08D1000, Apr. 16, 2009, National Semiconductor.
DDC112, Jan. 2000, Texas Instruments.
ThS0842, Dec. 1999, Texas Instruments.

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