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Class Information
Number: 360/29
Name: Dynamic magnetic information storage or retrieval > Modulating or demodulating
Description: Subject matter including specific modulator or demodulator circuitry or techniques.










Sub-classes under this class:

Class Number Class Name Patents
360/30 Frequency 118


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8711499 Methods for measuring media performance associated with adjacent track interference Apr. 29, 2014
8707147 Viterbi decoder method and apparatus with RI detector in servo channel Apr. 22, 2014
8693117 Method and system for precompensation of data output Apr. 8, 2014
8625230 Position demodulator and position demodulation method Jan. 7, 2014
8570842 Tar with write-synchronized laser modulation Oct. 29, 2013
8553345 Position demodulation apparatus and position demodulation method Oct. 8, 2013
8547655 Magnetic recording method using microwave assisted head Oct. 1, 2013
8520334 Disk storage device, controller of the same, controlling method performed by the same, and electronic device Aug. 27, 2013
8514512 Disk storage device, controller of the same, controlling method performed by the same, and electronic device Aug. 20, 2013
8446683 Systems and methods for data pre-coding calibration May. 21, 2013
8358479 Method and apparatus to limit DC-level in coded data Jan. 22, 2013
8345365 Data processing system having data reproduction independent of data processing Jan. 1, 2013
8300351 Magnetic recording apparatus Oct. 30, 2012
8279546 Systems and methods for sync mark detection using correlation Oct. 2, 2012
8261172 Viterbi decoder method and apparatus with RI detector in servo channel Sep. 4, 2012
8254049 Systems and methods for improved synchronization between an asynchronously detected signal and a synchronous operation Aug. 28, 2012
8213106 Zoned servo system Jul. 3, 2012
8159766 Data processing system having data reproduction independent of data processing Apr. 17, 2012
8144415 Apparatus, signal-processing circuit and device for magnetic recording system Mar. 27, 2012
8120870 Asymmetry correction in read signal Feb. 21, 2012
8098447 Method and apparatus to limit DC-level in coded data Jan. 17, 2012
8051365 Viterbi decoder method and apparatus with RI detector in servo channel detector in servo channel Nov. 1, 2011
8045640 Two-level demodulation method and device Oct. 25, 2011
8023219 Storage device, head position detection method and control circuit Sep. 20, 2011
7933084 Corrective adjustment of recording characteristics in digital renditions of analog recordings Apr. 26, 2011
7907359 Finite field based short error propagation modulation codes Mar. 15, 2011
7889447 Readback signal-based head-disc contact detection using AM/FM demodulation Feb. 15, 2011
7864464 Disk clock system with up-sampler to generate frequency offset Jan. 4, 2011
7852589 Disk drive Dec. 14, 2010
7835094 Embedded track information for patterned media Nov. 16, 2010
7821731 Timing recovery for data storage channels with buffered sectors Oct. 26, 2010
7813065 Systems and methods for acquiring modified rate burst demodulation in servo systems Oct. 12, 2010
7715134 Demodulation compensation for spiral servo tracks in hard disk drives May. 11, 2010
7710673 Phase locking apparatus, phase locking method, data reproducing apparatus, data reproducing method, and programs May. 4, 2010
7706092 Null servo pattern for bit-patterned media Apr. 27, 2010
7663830 Method of forming servo data of HDD and self servo write method using the same Feb. 16, 2010
7643233 Disk clock system with up-sampler to generate frequency offset Jan. 5, 2010
7619841 Disk drive subtracting low frequency disturbance from a servo burst signal Nov. 17, 2009
7573665 Magnetic tape read channel signal values developed employing intermediate bits of the path memory of a PRML Viterbi detector Aug. 11, 2009
7561361 Dynamic synchronization of timing signals Jul. 14, 2009
7561357 Decoder with energization control circuit Jul. 14, 2009
7532425 Reproducing method, reproducing apparatus, recording and reproducing apparatus, and magnetic recording medium May. 12, 2009
7532421 Servo demodulating circuit and method May. 12, 2009
7502186 Disk drive clock tracking circuit, error compensation circuit and method Mar. 10, 2009
7489460 Magnetic data read circuit and card processing unit Feb. 10, 2009
7486456 Finite field based short error propagation modulation codes Feb. 3, 2009
7463437 Demodulation compensation for spiral servo tracks in hard disk drives Dec. 9, 2008
7453663 Disk drives with servo burst patterns radially offset in different radial spokes of a disk and methods of positioning based thereon Nov. 18, 2008
7430082 Circuit and method for demodulating a servo position burst Sep. 30, 2008
7405894 Frequency, phase, and gain estimation technique for use in a read channel receiver of a hard disk drive Jul. 29, 2008

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