Back to results
US 8,004,942 B1Granted
Method and apparatus for reading
AssigneeMarvell International Ltd.
InventorsPeter Kivits, Luc Segers
Life of this patent
Estimating the term…
Abstract
Aspects of the disclosure provide a method to efficiently calibrate parameters of a memory reading device. The method can include defining two or more value sets for the parameters of the memory reading device to read a memory medium, reading the memory medium with the parameters set respectively at the value sets, receiving performance signals corresponding to operation of the memory reading device having the parameters set at the value sets, respectively, and setting the parameters of the memory reading device for reading the memory medium based on the performance signals.
Claims27
A method for reading a memory medium, comprising:
- defining two or more value sets for parameters of a device to read the memory medium by selecting only at most one-quarter of a full combination set of the parameters according to a design of experiments methodology including a Taguchi table, wherein the parameters comprise at least one of a focus offset, a radial offset, a tilt angle, a collimator position, a gain of an amplifier and a bandwidth of a preamplifier;
- reading the memory medium using the two or more value sets for the parameters;
- receiving performance signals corresponding to operation of the device having the value sets for the parameters, respectively;
- and
- setting the parameters for reading the memory medium based on the performance signals.
2 more elements
An apparatus for reading a memory medium, comprising:
- a reading unit configured to receive signals from the memory medium;
- a controller coupled to the reading unit, wherein the controller is configured to define two or more value sets for parameters of the reading unit to read the memory medium by selecting only at most one-quarter of a full combination set of the parameters according to a design of experiments methodology including a Taguchi table, wherein the parameters comprise at least one of a focus offset, a radial offset, a tilt angle, a collimator position, a gain of an amplifier and a bandwidth of a preamplifier, set the parameters of the reading unit according to the value sets, receive performance signals corresponding to operation of the reading unit having the parameters set at the value sets, and set the parameters of the reading unit for reading the memory medium based on the performance signals;
- and
- a driver unit coupled to the controller, the driver unit configured to cause mechanical adjustment of the reading unit to change at least one of the parameters of the reading unit.
1 more element
A processor for calibrating a device to read a memory medium, comprising:
- an interface being configured to provide a value set for setting parameters of the device, and receive signals from the device;
- and
- a processor unit coupled to the interface, the processor unit being configured to define two or more value sets for the parameters of the device to read the memory medium by selecting only at most one-quarter of a full combination set of the parameters according to a design of experiments methodology including a Taguchi table, wherein the parameters comprise at least one of a focus offset, a radial offset, a tilt angle, a collimator position, a gain of an amplifier and a bandwidth of a preamplifier, transmit the two or more value sets to the interface respectively, determine performance signals from the signals corresponding to operation of the device having the parameters set at the value sets, determine the parameters of the device for reading the memory medium based on the performance signals, and cause mechanical adjustment of the device to change at least one of the parameters of the device.
A device, comprising
- a processor configured to process data from a memory medium;
- a reading unit coupled to the processor, the reading unit being configured to read the data from the memory medium and provide the data to the processor;
- a controller coupled to the reading unit, the controller being configured to define two or more value sets for parameters of the reading unit to read the memory medium by selecting only at most one-quarter of a full combination set of the parameters according to a design of experiments methodology including a Taguchi table, wherein the parameters comprise at least one of a focus offset, a radial offset, a tilt angle, a collimator position, a gain of an amplifier and a bandwidth of a preamplifier, set the parameters of the reading unit according to the value sets, receive performance signals corresponding to operation of the reading unit having the parameters set at the value sets, and set the parameters of the reading unit for reading the memory medium based on the performance signals;
- and
- a driver unit coupled to the controller, the driver unit configured to cause mechanical adjustment of the reading unit to change at least one of the parameters of the reading unit.
2 more elements
Dependencies are inferred from the claim text.