Patents by Inventor Ali DARWISH

Ali DARWISH 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).

  • Patent number: 9584169
    Abstract: A radio transmitter having a RF signal source. A splitter receives an input signal from the signal source and divides that input signal into two output signals. These output signals are fed into two phase shifters. A phase control signal is applied to each phase shifter so that the vector sum of the output signals represents the desired amplitude and phase of the desired transmitted signal. The outputs of both phase shifters are both frequency multiplied and amplified before recombining to form the transmitter output signal.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: February 28, 2017
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Joe Qiu, Ali Darwish, Hingloi Alfred Hung
  • Patent number: 8912577
    Abstract: According to various embodiments, a distributed heating transistor includes: a plurality of active regions where transistor action occurs including a heat source; and at least one inactive region where transistor action does not occur and no heat source is present, wherein adjacent active regions are separated by the at least one inactive region. The distributed heating transistor may be configured as field effect transistors (FETs), and bipolar junction transistors (BJTs). Methods for forming the distributed heating transistors are also provided.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: December 16, 2014
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ali Darwish, Hingloi Alfred Hung
  • Patent number: 8816397
    Abstract: A ring-shaped transistor includes a set of gates. Each gate of the set is disposed between a corresponding source and a corresponding drain. The set of gates are arranged such that all of the set of gates cannot be aligned with fewer than three imaginary straight lines drawn through the gates, with one of the imaginary straight lines passing only once though each of the set of gates.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: August 26, 2014
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ali Darwish, Hingloi Alfred Hung
  • Patent number: 8791759
    Abstract: An amplifier for an integrated circuit has a plurality of ratioed current mirrors connected to each other in a stacked configuration. Each ratio mirror has at least two resistors and at least two bipolar transistors connected to each other via said at least two resistors. Each amplifying transistor, contains a capacitor, and potentially and inductor, to internally match the transistors that make up the amplifying stack. DC, harmonic and s-parameter simulations are performed to provide an optimal impedance for each of the stacked transistors to maximize the RF power output of each stacked layer and the amplifier.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: July 29, 2014
    Assignees: The United States of America as Represented by the Secretary of the Army, The George Washington University
    Inventors: Ali Darwish, Thomas J. Farm, Mona Zaghloul
  • Publication number: 20140077268
    Abstract: According to various embodiments, a distributed heating transistor includes: a plurality of active regions where transistor action occurs including a heat source; and at least one inactive region where transistor action does not occur and no heat source is present, wherein adjacent active regions are separated by the at least one inactive region. The distributed heating transistor may be configured as field effect transistors (FETs), and bipolar junction transistors (BJTs). Methods for forming the distributed heating transistors are also provided.
    Type: Application
    Filed: September 19, 2012
    Publication date: March 20, 2014
    Applicant: U.S. Government as represented by the Secretary of the Army
    Inventors: Ali Darwish, Hingloi Alfred Hung
  • Publication number: 20120242410
    Abstract: An amplifier for an integrated circuit has a plurality of ratioed current mirrors connected to each other in a stacked configuration. Each ratio mirror has at least two resistors and at least two bipolar transistors connected to each other via said at least two resistors. Each amplifying transistor, contains a capacitor, and potentially and inductor, to internally match the transistors that make up the amplifying stack. DC, harmonic and s-parameter simulations are performed to provide an optimal impedance for each of the stacked transistors to maximize the RF power output of each stacked layer and the amplifier.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 27, 2012
    Inventors: Ali DARWISH, Thomas J. FARM, Mona ZAGHLOUL