Patents by Inventor Finbarr J. McGrath

Finbarr J. McGrath 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).

  • Apparatus, methods and articles of manufacture for multiband signal processing
    Patent number: 7187231
    Abstract: Apparatus, methods and articles of manufacture for multiband transmitter power amplification are provided wherein one or more amplifying devices, of which at least one may be one or more current sources, have impedances matched for different input and output frequencies by way of various impedance matching circuits.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: March 6, 2007
    Assignees: M/A-COM, Inc., M/A-COM Eurotec, B.V.
    Inventors: Finbarr J. McGrath, Eugene Heaney, Pierce J. Nagle, Andrei V. Grebennikov
  • Apparatus, methods and articles of manufacture for multiband signal processing
    Publication number: 20040104768
    Abstract: Apparatus, methods and articles of manufacture for multiband transmitter power amplification are provided wherein one or more amplifying devices, of which at least one may be one or more current sources, have impedances matched for different input and output frequencies by way of various impedance matching circuits.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 3, 2004
    Applicants: M/A-COM Eurotec, M/A-COM, Inc.
    Inventors: Finbarr J. McGrath, Eugene Heaney, Pierce J. Nagle, Andrei V. Grebennikov
  • Gain-tilt amplifier
    Patent number: 5051705
    Abstract: A feedback circuit couples a base amplifier output to the amplifier input for feeding back a portion of an amplified input signal. The feedback circuit includes an inductor coupled in series with a variable resistance. The variable feedback resistance is provided by a feedback FET having a gate for receiving a control signal for varying the resistance between the source and drain. The gain of the base amplifier is determined over the predetermined frequency range by the combined impedance of the inductor and resistance. The base amplifier is a field-effect transistor (FET). The feedback inductance is taken from a portion of a coil coupling the drain of the base FET with an output terminal.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: September 24, 1991
    Assignee: Pacific Monolithics
    Inventors: Sanjay B. Moghe, Ravi Ramachandran, Finbarr J. McGrath, Robert D. Genin