Patents by Inventor Ian Gresham

Ian Gresham 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).

  • Voltage controlled oscillator with cascaded emitter follower buffer stages
    Patent number: 7791422
    Abstract: A voltage controlled oscillator (VCO) is provided that includes an output buffer having a first buffer stage including a first transistor and a second buffer stage including a second transistor. The first and second transistors are connected in a cascaded emitter follower buffer arrangement.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: September 7, 2010
    Assignee: Autoliv ASP, Inc.
    Inventors: Yumin Lu, Ian Gresham
  • TUNABLE CAPACITIVELY LOADED TRANSFORMER PROVIDING SWITCHED INDUCTANCE FOR RF/MICROWAVE INTEGRATED CIRCUITS
    Publication number: 20100123536
    Abstract: A tunable transformer providing switched inductance includes a primary winding and a secondary winding. A switch is connected to the secondary winding of the transformer. At least one capacitor is also connected to the secondary winding of the transformer with the switch.
    Type: Application
    Filed: November 19, 2008
    Publication date: May 20, 2010
    Inventors: Yumin Lu, Ian Gresham
  • VOLTAGE CONTROLLED OSCILLATOR WITH CASCADED EMITTER FOLLOWER BUFFER STAGES
    Publication number: 20090102568
    Abstract: A voltage controlled oscillator (VCO) is provided that includes an output buffer having a first buffer stage including a first transistor and a second buffer stage including a second transistor. The first and second transistors are connected in a cascaded emitter follower buffer arrangement.
    Type: Application
    Filed: October 17, 2007
    Publication date: April 23, 2009
    Inventors: Yumin Lu, Ian Gresham