Patents by Inventor Rehan Ahmed

Rehan Ahmed 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).

  • Publication number: 20130148224
    Abstract: A method, apparatus, and system are provided for implementing spin-torque oscillator sensing with an enhanced integrated demodulator for hard disk drives. The demodulator receives an input signal from a STO read sensor having an oscillation frequency ? related to the strength of the detected magnetic signal field. The demodulator includes a pair of mixers coupled to a quadrature reference oscillator with respective quadrature components cos(?0t), and sin(?0t) of the quadrature reference oscillator being mixed with a received input signal to form signals at the sum and difference frequencies, ?±?0. Each of these mixer products is lowpass filtered by a respective a lowpass filter to remove the sum frequency components for providing a demodulator output signal that is directly proportional the STO oscillation frequency ?. The demodulator output signal is used for processing by data detection electronics.
    Type: Application
    Filed: December 9, 2011
    Publication date: June 13, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands. B.V.
    Inventors: Patrick Mesquita Braganca, Richard Leo Galbraith, Bruce Alvin Gurney, Neil Smith, Bruce Wilson, Rehan Ahmed Zakai
  • Patent number: 8310902
    Abstract: A thermal-assisted magnetic recording (TAMR) system is described which generates laser-pulse signals from the write data line. Additionally, training signals for initial synchronization are fed to the preamp IC using the write data line during servo read cycle. This requires no increase in the number of wires going to read-write driver chip (R/W IC) (preamp). In embodiments of the invention the R/W IC also includes registers that are set using serial data from the system electronics to influence the characteristics of the drive signal to the laser.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: November 13, 2012
    Assignee: HGST Netherlands B.V.
    Inventors: John Thomas Contreras, Rehan Ahmed Zakai
  • Publication number: 20120141775
    Abstract: A method of coating an article includes the steps of providing a powder comprising coated particles; and spray coating the powder onto a surface of the article to form a composite coating. The spray coating may be carried out by combustion spraying, gas plasma spraying, including vacuum plasma spraying (VPS), and cold spraying. The article may be an implant for surgical or dental use. The powder may include particles of metal coated calcium phosphates, especially metal coated hydroxyapatite. The particles may include bioactive agents.
    Type: Application
    Filed: May 28, 2010
    Publication date: June 7, 2012
    Applicant: RRG COATINGS LIMITED
    Inventors: Rehan Ahmed, Gerardus Hendricus Markx