Patents by Inventor Moulay Rachid Elidrissi

Moulay Rachid Elidrissi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods for storing and accessing address information in a servo layer of a storage medium
    Patent number: 9406326
    Abstract: A method including determining a first frequency for (i) a first track in a servo layer of a storage medium, or (ii) a first sector in the servo layer. The servo layer is dedicated to storing servo information. The method further includes: obtaining first address information addressing the first track or the first sector; modulating the first address information according to the first frequency; and storing the modulated first address information in the servo layer. Subsequent to the storing of the modulated first address information, the servo information includes the modulated first address information.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: August 2, 2016
    Assignee: Marvell International Ltd.
    Inventors: Song Hua Zhang, Moulay Rachid Elidrissi, Kheong Sann Chan
  • METHODS FOR STORING AND ACCESSING ADDRESS INFORMATION IN A SERVO LAYER OF A STORAGE MEDIUM
    Publication number: 20160055872
    Abstract: A method including determining a first frequency for (i) a first track in a servo layer of a storage medium, or (ii) a first sector in the servo layer. The servo layer is dedicated to storing servo information. The method further includes: obtaining first address information addressing the first track or the first sector; modulating the first address information according to the first frequency; and storing the modulated first address information in the servo layer. Subsequent to the storing of the modulated first address information, the servo information includes the modulated first address information.
    Type: Application
    Filed: November 4, 2015
    Publication date: February 25, 2016
    Inventors: Song Hua Zhang, Moulay Rachid Elidrissi, Kheong Sann Chan
  • Data storage device
    Patent number: 9202512
    Abstract: According to an embodiment of the present invention, a data storage device comprising a motor having a stator is disclosed. The stator may include a substrate having a first surface and a second surface opposite to the first surface; and a n-phase winding arrangement having n phase windings; wherein each phase winding comprises m flat fractional-pitch coils arranged on the first surface of the substrate such that the coils are spaced apart uniformly along a closed loop and connected in series; wherein each coil together with an angular section of the substrate between the coil and an adjacent coil of the same phase winding defines a stator pole-pair; and wherein m is an integer larger than 1.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: December 1, 2015
    Assignee: Marvell International LTD.
    Inventors: Chao Bi, Kui Cai, Kheong Sann Chan, Zhi Yong Ching, Moulay Rachid Elidrissi, Guchang Han, Zhimin He, Phyu Hla Nu, Jiang Feng Hu, Wei Hua, Quan Jiang, Siang Huei Leong, Wuzhong Lin, Bo Liu, Yansheng Ma, Chun Lian Ong, Jianzhong Shi, Cheng Su Soh, Sufui Sophia Tan, Li Wang, Chiew Leong Wong, Weiya Xi, Khai Leong Yong, Shengkai Yu, Yin Quan Yu, Zhimin Yuan, Jing Liang Zhang, Tiejun Zhou, Pantelis Alexopoulos, Budi Santoso, Qide Zhang, Kannan Sundaravadivelu, Ningyu Liu, Jianqiang Mou, Chong Wee Lee, Ke Gan, Boon Long Ibrahim See, Leonard Gonzaga, Wee Kiat Lim, Mengjun Liu, Venkataramanan Venkatakrishnan, Cheng Peng Tan
  • Method of processing address information for a data storage device, and storage medium, modulator, demodulator, and data storage device
    Patent number: 9190106
    Abstract: According to embodiments of the present invention, a storage medium is provided. The storage medium includes a dedicated servo layer including a plurality of servo tracks, wherein at least one of the plurality of servo tracks includes a modulated address information including an address information being modulated by at least one frequency associated with the at least one of the plurality of servo tracks. According to further embodiments of the present invention, a modulator for a storage medium, a demodulator for a storage medium, a data storage device and a method of processing address information for a data storage device are also provided.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: November 17, 2015
    Assignee: Marvell International Ltd.
    Inventors: Song Hua Zhang, Moulay Rachid Elidrissi, Kheong Sann Chan
  • Joint detector/ decoder devices and joint detection/ decoding methods
    Patent number: 9048987
    Abstract: According to various embodiments, a joint detection/decoder device may be provided. The detector and decoder device may include: an input circuit configured to receive an input signal; a survivor splitting circuit configured to produce a plurality of survivors of a next instance based on at least one survivor of a previous instance and based on the input signal; and a survivor discarding circuit configured to discard survivors based on a set of predetermined criteria; wherein each survivor has an associated bit sequence.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: June 2, 2015
    Assignee: Agency for Science, Technology and Research
    Inventors: Kheong Sann Chan, Moulay Rachid Elidrissi, Sari Shafidah Bte Shafiee
  • DATA STORAGE DEVICE
    Publication number: 20150146322
    Abstract: According to an embodiment of the present invention, a data storage device comprising a motor having a stator is disclosed. The stator may include a substrate having a first surface and a second surface opposite to the first surface; and a n-phase winding arrangement having n phase windings; wherein each phase winding comprises m flat fractional-pitch coils arranged on the first surface of the substrate such that the coils are spaced apart uniformly along a closed loop and connected in series; wherein each coil together with an angular section of the substrate between the coil and an adjacent coil of the same phase winding defines a stator pole-pair; and wherein m is an integer larger than 1.
    Type: Application
    Filed: August 31, 2012
    Publication date: May 28, 2015
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Chao Bi, Kui Cai, Kheong Sann Chan, Zhi Yong Ching, Moulay Rachid Elidrissi, Guchang Han, Zhimin He, Phyu Hla Nu, Jiang Feng Hu, Wei Hua, Quan Jiang, Siang Huei Leong, Wuzhong Lin, Bo Liu, Yansheng Ma, Chun Lian Ong, Jianzhong Shi, Cheng Su Soh, Sufui Sophia Tan, Li Wang, Chiew Leong Wong, Weiya Xi, Khai Leong Yong, Shengkai Yu, Yin Quan Yu, Zhimin Yuan, Jing Liang Zhang, Tiejun Zhou, Pantelis Alexopoulos, Budi Santoso, Qide Zhang, Kannan Sundaravadivelu, Ningyu Liu, Jianqiang Mou, Chong Wee Lee, Ke Gan, Boon Long Ibrahim See, Leonard Gonzaga, Wee Kiat Lim, Mengjun Liu, Venkataramanan Venkatakrishnan, Cheng Peng Tan
  • METHOD AND SYSTEM FOR ESTIMATING THE POSITION ERROR SIGNAL (PES) METRIC FOR A MAGNETIC STORAGE SYSTEM
    Publication number: 20150055242
    Abstract: A method and system for estimating the position error signal (PES) metric for a magnetic storage system. The method comprises the steps of reading multiple readback tracks from a storage medium of the magnetic storage system using respective readers of a multiple reader head positioned at or near a data track of interest; employing an adaptive SMR equalizer to equalize the signals from the multiple read head; and extracting information from the adaptive SMR equalizer sub-filters as an estimate of the PES metric.
    Type: Application
    Filed: August 20, 2014
    Publication date: February 26, 2015
    Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH
    Inventors: Moulay Rachid ELIDRISSI, Kheong Sann CHAN, Zhimin YUAN
  • METHOD OF PROCESSING ADDRESS INFORMATION FOR A DATA STORAGE DEVICE, AND STORAGE MEDIUM, MODULATOR, DEMODULATOR, AND DATA STORAGE DEVICE
    Publication number: 20140300985
    Abstract: According to embodiments of the present invention, a storage medium is provided. The storage medium includes a dedicated servo layer including a plurality of servo tracks, wherein at least one of the plurality of servo tracks includes a modulated address information including an address information being modulated by at least one frequency associated with the at least one of the plurality of servo tracks. According to further embodiments of the present invention, a modulator for a storage medium, a demodulator for a storage medium, a data storage device and a method of processing address information for a data storage device are also provided.
    Type: Application
    Filed: November 21, 2012
    Publication date: October 9, 2014
    Inventors: Song Hua Zhang, Moulay Rachid Elidrissi, Kheong Sann Chan
  • JOINT DETECTOR/ DECODER DEVICES AND JOINT DETECTION/ DECODING METHODS
    Publication number: 20140219398
    Abstract: According to various embodiments, a joint detection/decoder device may be provided. The detector and decoder device may include: an input circuit configured to receive an input signal; a survivor splitting circuit configured to produce a plurality of survivors of a next instance based on at least one survivor of a previous instance and based on the input signal; and a survivor discarding circuit configured to discard survivors based on a set of predetermined criteria; wherein each survivor has an associated bit sequence.
    Type: Application
    Filed: October 18, 2013
    Publication date: August 7, 2014
    Inventors: Kheong Sann CHAN, Moulay Rachid Elidrissi, Sari Shafidah Bte Shafiee
  • Data storage device including a recording channel, a detector, and a noise prediction circuit, and method of processing a signal in a data storage device
    Patent number: 8786968
    Abstract: According to embodiments of the present invention, a data storage device is provided. The data storage device includes a recording channel configured to carry a signal; a detector configured to detect the signal from the recording channel; and a noise prediction circuit configured to predict noise affecting the recording channel and the detected signal based on a noisy channel model. According to further embodiments of the present invention, a method of processing a signal in a data storage device is also provided.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: July 22, 2014
    Assignee: Agency for Science, Technology and Research
    Inventors: Zhi Liang Qin, Moulay Rachid Elidrissi, Kheong Sann Chan