Patents by Inventor Fatima Husna

Fatima Husna 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).

  • High speed rectifier circuit
    Patent number: 8681518
    Abstract: Provided is a rectifier circuit that includes a depletion mode semiconductor having an output connected to a rectified signal output node of the rectifier circuit and a hot carrier semiconductor diode having a cathode connected to a source node of the depletion mode semiconductor and an anode connected to a gate node of the depletion mode semiconductor. The rectifier may include an alternating current (AC) input node that is connected to the anode of the hot carrier semiconductor diode and the gate node of the depletion mode semiconductor and that is configured to receive an AC input signal.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: March 25, 2014
    Assignee: Cree, Inc.
    Inventors: Robert Callanan, Fatima Husna
  • Rectifier with SiC bipolar junction transistor rectifying elements
    Patent number: 8218345
    Abstract: A rectifier circuit can include an input circuit and first and second silicon carbide (SiC) bipolar junction transistors (BJTs). The input circuit is configured to respond to an alternating current (AC) input signal by generating a first pair of opposite polarity AC signals and a second pair of opposite polarity AC signals. The first pair of AC signals has a greater voltage range than the second pair of AC signals. The first and second SiC BJTs each include an input terminal connected to receive a different one of the second pair of opposite polarity AC signals, a base terminal connected to receive a different one of the first pair of opposite polarity AC signals, and an output terminal connected to a rectified signal output node of the rectifier circuit.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: July 10, 2012
    Assignee: Cree, Inc.
    Inventors: Robert Joseph Callanan, Fatima Husna
  • RECTIFIER WITH SIC BIPOLAR JUNCTION TRANSISTOR RECTIFYING ELEMENTS
    Publication number: 20100238692
    Abstract: A rectifier circuit can include an input circuit and first and second silicon carbide (SiC) bipolar junction transistors (BJTs). The input circuit is configured to respond to an alternating current (AC) input signal by generating a first pair of opposite polarity AC signals and a second pair of opposite polarity AC signals. The first pair of AC signals has a greater voltage range than the second pair of AC signals. The first and second SiC BJTs each include an input terminal connected to receive a different one of the second pair of opposite polarity AC signals, a base terminal connected to receive a different one of the first pair of opposite polarity AC signals, and an output terminal connected to a rectified signal output node of the rectifier circuit.
    Type: Application
    Filed: March 20, 2009
    Publication date: September 23, 2010
    Inventors: Robert Joseph Callanan, Fatima Husna