Patents by Inventor Chakkalakal Tomy

Chakkalakal Tomy 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).

  • Magnetic field feedback based spintronic oscillator
    Patent number: 9088243
    Abstract: The embodiments herein relate to a magnetic field feedback based spintronic microwave oscillator driven by DC current. The microwave oscillator works based on a magnetic tunnel junction structure connected to a feedback waveguide. Any fluctuation in the magnetization direction of free magnetization layer of MTJ drives an oscillating current through the feedback waveguide which in turn exerts an oscillating magnetic field on the free layer and amplifies the magnetization fluctuations. If the DC current passing through the MTJ is more than a critical value, continuous processing states of the magnetization are possible. The critical current is independent of the thickness and magnetization of the free layer. A MTJ can be driven into spontaneous oscillations with DC current and magnetic field feedback circuit and can act as a spintronic microwave oscillator.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: July 21, 2015
    Inventors: Ashwin Tulapurkar, Chakkalakal Tomy, Yoshishige Suzuki, Dinesh Kumar, Katsunori Konishi
  • MAGNETIC FIELD FEEDBACK BASED SPINTRONIC OSCILLATOR
    Publication number: 20140070896
    Abstract: The embodiments herein relate to a magnetic field feedback based spintronic microwave oscillator driven by DC current. The microwave oscillator works based on a magnetic tunnel junction structure connected to a feedback waveguide. Any fluctuation in the magnetization direction of free magnetization layer of MTJ drives an oscillating current through the feedback waveguide which in turn exerts an oscillating magnetic field on the free layer and amplifies the magnetization fluctuations. If the DC current passing through the MTJ is more than a critical value, continuous processing states of the magnetization are possible. The critical current is independent of the thickness and magnetization of the free layer. A MTJ can be driven into spontaneous oscillations with DC current and magnetic field feedback circuit and can act as a spintronic microwave oscillator.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 13, 2014
    Applicant: Indian Institute of Technology Bombay
    Inventors: Ashwin Tulapurkar, Chakkalakal Tomy, Yoshishige Suzuki, Dinesh Kumar, Katsunori Konishi